Question

X|Y

—|—

8|1.6

15|3

22|4.4

What is the constant rate of proportionality in the equation y=rx

Answer 1

The constant rate of proportionality is r = 0.2

Explanation:

We have an equation in the following format:

y = rx

In which r is the constant rate of proportionality.

To find r, we find a pair of x and y and replace.

8|1.6

This means that when x = 8, y = 1.6. So

y = rx

1.6 = 8r

8r = 1.6

r = 1.6/8

r = 0.2

The constant rate of proportionality is r = 0.2