Question

y = -\frac{1}{3}x + 100
thats correct! the equation for the slope of the line is y = -\frac{1}{3}x + 100.
lets check your equation.
if x = 30, what is the value of y?
enter your answer. then choose done.
done
bottle filter water quality test
water quality score (y-axis: 0 - 110), gallons of water processed (x-axis: 0 - 80) with scatter plot points

Explanation:

Step1: Substitute x = 30 into the equation

We have the equation \( y = -\frac{1}{3}x + 100 \). Substitute \( x = 30 \) into it: \( y = -\frac{1}{3} \times 30 + 100 \)

Step2: Calculate the value

First, calculate \( -\frac{1}{3} \times 30 = -10 \). Then, \( y = -10 + 100 = 90 \)

Answer:

90