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WR #5
Contributed by: Decker

Last weekend, Charlie raked leaves in his front yard. 

He noticed that     kilograms of leaves filled      of a bag.

 

What is the unit rate for kilograms of leaves per bag?

7
3
kg per bag
4
9

Population density is the number of people per unit of

area.  The population density of a certain region is 60

peopler per square kilometer.  If the region covers 23

square kilometers, what is the population of the

region?

people

In a certain chemical, the ratio of zinc to copper is

3 to 16.  A jar of the chemical contains 320 grams of

copper.  How many grams of zinc does it contain?

grams of zinc

Part A: Find the constant

of proportionality.

Part B: How long will the jet take to travel 4,620 miles?

The distance a jet aircraft flies has a proportional

relationship with its number of hours in flight.  The

table shows the number of miles flown for a number

of hours in flight.

hours
miles per hour

Part A: Find the correct constant of

proportionality.

Part B: What was your friend's likely error?

Your friend found x - y

Your friend found x • y

Your friend found     

Your friend found x + y

You and a friend look at the graph.  Your friend incorrectly says the constant of

proportionality of y to x is        .

18
1
x
y
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