Abaker, in 70 minutes, iced 40 cupcakes and, in 49 minutes, iced 28 cupcakes. what is the constant of proportionality?

Step-by-step explanation:

The constant of proportionality is the slope of the line joining the two points

(70,40) and (49,28).

Recall the slope formula:

We substitute the point to get:

Alternatively:

A proportional relation is given by

where k is the constant of proportionality.

Using any point, we substitute and solve for k.

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answer: the answer is 110