Question

Identify the y-intercept of the line below. 3x - 10y = -90A. (9, 0)B. (-30, 0)C. (0, 9)D. (0, -30)

Answer 1

The y-intercept of a line occurs when the line crosses the y-axis. Therefore, the value of x for this point is x = 0.

So, evaluate the line for x = 0:

`\begin{gathered} 3(0)-10y=-90 \\ -10y=-90 \\ Solve_{\text{ }}for_{\text{ }}y: \\ y=(-90)/(-10) \\ y=9 \end{gathered}`

Answer:

The y-intercept is:

C. (0,9)