Question

the graph of a linear function is shown. which word describes the slope of the line?
options: positive, negative, zero, undefined

Explanation:

A horizontal linear function has a constant y-value, so the change in y between any two points is 0. The slope formula is $\frac{\Delta y}{\Delta x}$, and when $\Delta y = 0$, the slope equals 0.

Answer:

○ zero