Question

Calculate the rate of change for the following data:A) -6B) 2C) 12D) 4

Answer 1

You have to use the formula of the rate of change in algebra

$\frac{Δy}{Δx}=\frac{y_2-y_1}{x_2-x_1}$

Now take 2 points, whatever you want:

I will take (2,5) and (7,25)

Now replace and solve:

$\frac{y_{2}-y_{1}}{x_{2}-x_{1}}=\frac{25-5}{7-2}=\frac{20}{5}=4$

The answer is 4, you can take any other points and prove that are always fulfilled.