WK 21 Mon Proportional given a graph or table
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1. From the graph, a straight line passing through the origin. 2. From the table, the Constant of Proportionality are all the same. Which means the ratio comparing y-value to thex-value; that is y-value divided by x-value. Data is proportional if: Study the following slides and decide if data is proportional based on reasoning.  Not proportional because the line does not passthrough the origin.  Not proportional because the line is not straight.  Proportional because the straight line does passthrough the origin. Domain/Independent X-values Mules 1 2 3 4 Proportional Data Range/Dependent Y-values Bales of hay 2 8 6 4 Constant ofProportionality(Y divided by X) 4/2 = 2 8/4 = 2 2/1 = 2 6/3 = 2 Y X Domain/Independent X-values Pounds of banannas 2 3 5 7 Not Proportional Data Range/Dependent Y-values Cost 2.50 7.75 8.25 21.00 Constant ofProportionality(Y divided by X) 7.50/3 = 2.50 8.25/5 = 1.65 21.00/7 = 3.00 2.50/2 = 1.25 Y X  Determine if proportional. If it is, determine the constantof proportionality (must be a ratio). Constant of Proportionality Yes No  Determine if proportional. If it is, determine the constantof proportionality (must be a ratio). Yes No Constant of Proportionality  Determine if proportional. If it is, determine the constantof proportionality (must be a ratio). Yes Constant of Proportionality No  Determine if proportional. If it is, determine the constantof proportionality (must be a ratio). Constant of Proportionality Yes No |
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