- Practice for The inverse linear function
Find the inverse of the function
f     (x)  = -x - 9
f     (x)  = x + 9
f    (x)   = x - 9
f-1 (x)   = x/9
-1
-1
-1
f(x) = x - 9
Find the inverse of the function
f     (x)  = ½(x - 5)
f     (x)  = ½(x + 5)
f    (x)   = ½x + 5
f-1 (x)   = 2x - 5
f    (x)   = ½x - 5
-1
-1
-1
f(x) = 2x - 5
Find the INVERSE of the following 
(-1,3), (8,2), (1,3), (-2,5)
(3,-1), (2,8), (3,1), (5,-2)
(3,1), (2,8), (3,1), (5,2)
(3,1), (2,8), (3,1), (5,2)
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B.
A.
Which of the below graphs is  the inverse of the given graph.
A
B
C
D
C
D
Find the INVERSE of the following 
(3,-1), (2,8), (3,1), (5,-2)
(3,1), (2,8), (3,1), (5,2)
(3,1), (2,8), (3,1), (5,2)
(-1,3), (8,2), (1,3), (-2,5)
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Step 2:  Interchange y and x 
Find the inverse of the function
Step 1: Replace f(x) with y 
So,  the inverse of the function f(x) is 
Step 3:  Solve for y  
f     (x)  = -x - 9
f    (x)   = x - 9
-1
-1
y=
f(x) = x - 9
f     (x)  = x + 9
f-1 (x)   = x/9
=
=
-1
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Step 2:  Interchange y and x 
Step 3:  Solve for y  
Find the inverse of the function
Step 1: Replace f(x) with y 
f     (x)  = ½(x - 5)
f     (x)  = ½(x + 5)
So,  the inverse of the function f(x) is 
-1
-1
y=
f(x) = 2x - 5
(   )
f    (x)   = ½x + 5
f-1 (x)   = 2x - 5
=
=
-1
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B.
C
A.
Which of the below graphs is  the inverse of the given graph.
D
A
C
D
B
x represents represents the total monthly sales and f (x) represents the total earnings for the month

Ahmed sells laptops and makes a base salary of $2200 each month. 

He also earns 5% commission on his total sales. His total earnings E(x) for a month

 in which he compiled x dollars in total sales is E(x)=2200+0.05x

What do x and f (x) represent in the context of the original function?
x represents the total earnings for the month and f (x) represents the total monthly sales.
x represents number of months and (x) represents the total earnings for the month
x represents number of laptops and f (x) represents the basic salary.
Find the domain of the INVERSE relation 
Find the Range of the INVERSE relation 
Find the INVERSE of the following Relation
D: {-5,-2,-1,2}  
The inverse Relation
D: {-5,-2,-1,2}  
D: {-2,-1,1,3}
D: {-2,-1,1,3}
The original Relation
y
x
x
y
-5
D: {-4,-2,-1,2}
D: {-4,-2,-1,2}
D: {-2,-1,2,4} 
D: {-2,-1,2,4} 
-2
-1
2

Ahmed sells laptops and makes a base salary of $2200 each month. He also earns 

5% commission on his total sales. His total earnings E(x) for a month 

in which he compiled x dollars in total sales is E(x)=2200+0.05x

Find Ahmed's total sales for last month if his earnings for that month were $3450.
f-1(x)=
Ahmed had $                     in total sales for the month.
f-1(x)=
Find the inverse function
f-1(x)=
Write the number with no comma.
(x+2200)
(x-2200)
0.05
(x-2200)
0.5
5
f-1(x)=
f-1(x)=
f-1(x)=
(x+2200)
(x+2200)
(x-2200)
0.5
0.05
5
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Step 2:  Interchange y and x 
Find the inverse of the function
Step 1: Replace f(x) with y 
So,  the inverse of the function f(x) is 
Step 3:  Solve for y  
f     (x)  = -x - 9
f    (x)   = x - 9
-1
-1
y=
f(x) = x - 9
f     (x)  = x + 9
f-1 (x)   = x/9
=
=
-1
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Step 2:  Interchange y and x 
Find the inverse of the function
Step 1: Replace f(x) with y 
Step 3:  Solve for y  
So,  the inverse of the function f(x) is 
f     (x)  = ½(x - 5)
f     (x)  = ½(x + 5)
-1
-1
y=
(   )
f(x) = 2x - 5
f    (x)   = ½x + 5
f-1 (x)   = 2x - 5
=
=
-1

Hamad is making candles. He has already made 38 candles, and he makes 24 candles each day. 

The function C(x) = 24x + 38 represents the total number of candles C(x) he has in inventory, 

where x is the number of days since he began making more candles. 

 represents the total number of candles and  C-1(x) is the number of days since he began making more candles. 

What do x and C-1(x) represent in the context of the inverse function?
 is the number of days since he began making more candles and  C-1(x) represents the total number of candles 
 x represents the number of days since he began making more candles and C-1(xrepresents the number of candles he already has.
 represents the number of candles he already has and  C-1(x) is the number of days since he began making more candles. 
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Hamad is making candles. He has already made 38 candles, and he makes 24 candles each day. 

The function C(x) = 24x + 38 represents the total number of candles C(x) he has in inventory, 

where x is the number of days since he began making more candles. 

Select the inverse of the function C (x).
A.
A
B.
B
C
D.
C.
D
Find the inverse of the function
f     (x)  = ½(x - 5)
f     (x)  = ½(x + 5)
f    (x)   = ½x + 5
f-1 (x)   = 2x - 5
f    (x)   = ½x - 5
-1
-1
-1
f(x) = 2x - 10
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Step 2:  Interchange y and x 
Find the inverse of the function
Step 1: Replace f(x) with y 
Step 3:  Solve for y  
So,  the inverse of the function f(x) is 
f     (x)  = ½(x - 5)
f     (x)  = ½(x + 5)
-1
-1
y=
(   )
f(x) = 2x - 10
f    (x)   = ½x + 5
f-1 (x)   = 2x - 5
=
=
-1
x represents represents the total monthly sales and f -1(x) represents the total earnings for the month

Ahmed sells laptops and makes a base salary of $2200 each month. 

He also earns 5% commission on his total sales. His total earnings E(x) for a month

 in which he compiled x dollars in total sales is E(x)=2200+0.05x

What do x and f -1(x) represent in the context of the  inverse function?
x represents the total earnings for the month and f -1(x) represents the total monthly sales.
x represents number of months and f -1(x) represents the total earnings for the month
x represents number of laptops and f -1(x) represents the basic salary.
A) Complete the table 

Given f(x) = 2x - 5.

x   f(x)

-1  

1  

2  

Find the inverse function 
f -1 = 0.5x + 2.5
f -1 = 0.5x - 2.5
f -1 = x + 2.5
f -1 = x + 5
f -1 = x - 5
Find the below values
f-1  (-7)=
f-1  (-5)=
f-1  (-3)=
f-1  (0)=
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