Question

look at this graph: graph of a horizontal line at y=80 write the equation of the line.

Explanation:

Step1: Identify line type

The graph is a horizontal line, which has a slope of 0 and follows the form $y = k$, where $k$ is the constant y-value of all points on the line.

Step2: Find the constant y-value

The horizontal line passes through $y=80$, so $k=80$.

Answer:

$y=80$