Question

What is the rate of change between (9,-29) and (13,-28)?

Answer 1

Answer:

-20

Step-by-step explanation:

Answer 2

Answer:

$\frac{1}{4}$

Step-by-step explanation:

rate of change is a measure of the slope.

Calculate slope m using the slope formula

m = $\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

with (x₁, y₁ ) = (9, - 29) and (x₂, y₂ ) = (13, - 28)

m = $\frac{-28-(-29)}{13-9}$ = $\frac{-28+29}{4}$ = $\frac{1}{4}$ ← rate of change