What is the y-intercep is (0,-1) and slope is 4

y = 4x - 1

Step-by-step explanation:

Assuming you require the equation of the line.

The equation of a line in slope - intercept form

y = mx + c (m is the slope and c the y - intercept)

Here m = 4 and c = - 1, thus

y = 4x - 1 ← equation of line