Constant of Proportionality is Unit Rate

• 30 mph

• 40 mph

A speedboat travels 18 miles in 12 minutes. What is the speed of the speedboat in miles per hour? Type only the number of the answer.

(a)  

A bug crawled  $\frac{7}{10}$ mile in one day. How far will the bug travel in one week? Type only the numerical answer.

(a)  

Dante bought 15 pounds of metal for $36. Which choice shows metal that has the same unit cost as Dante's purchase?

• 5 pounds of metal for $12

• 6 pounds of metal for $15

• 8 pounds of metal for $18

• 9 pounds of metal for $21

• 7 pounds for $17.50

The constant of proportionality is...

• also known as the unit rate.

• the constant multiplicative rule of the proportional situation

• found by doing y/x for all the points. (AKA, divide each for the unit rate)

• all of the options here.

Identify the constant of proportionality.

If it's proportional, the multiplicative relationship IS the constant of proportionality.

• k = 2x

• k = 2

• k = 4

• none (not proportional)

In the equation y = 14x, what is the constant of proportionality? If it is proportional, the multiplicative relationship IS the constant of proportionality.

• y
• x
• 14

Is this equation representative of a proportional relationship?

y = 12x + 7

• Yes, it has multiplication in it, so it's proportional.

• No, the equation contains an addition step, so its not proportional.

• Yes, this equation is proportional because if x = 0, then also y = 0.

• No, this equation is not proportional because equations can't be proportional.