Question

1. concentration of pollutants:

a. interpret the slope of the equation in real world terms.

Explanation:

The equation of the line is given in slope - intercept form \(y = mx + b\), where \(m\) is the slope and \(b\) is the y - intercept. In the equation \(y=- 0.8x + 100\), the slope \(m=-0.8\). Here, \(y\) represents the concentration of pollutants in ppm and \(x\) represents the number of days. A negative slope indicates a decrease. The slope value of \(- 0.8\) means that for each additional day that passes, the concentration of pollutants (in ppm) decreases by 0.8 ppm.

Answer:

The slope of \(-0.8\) in the equation \(y = - 0.8x+100\) means that the concentration of pollutants decreases by 0.8 ppm per day.