Question

describe the rate of change for this relationship.
the amount of blueberries left
scones.
per batch of

Explanation:

Step1: Identify two points on the line

We can take the points (0, 90) and (12, 10).

Step2: Use the slope - formula

The slope formula is $m=\frac{y_2 - y_1}{x_2 - x_1}$. Here, $x_1 = 0,y_1 = 90,x_2=12,y_2 = 10$. Then $m=\frac{10 - 90}{12-0}=\frac{- 80}{12}=-\frac{20}{3}\approx - 6.67$.

Answer:

The amount of blueberries left decreases by $\frac{20}{3}$ (or approximately 6.67) per batch of scones.