Question

find the slope and y-intercept of each line. y=-3x the y- intercept is

Answer 1

The slope intercept equation for a line is y=mx+b

In this form m is the slope and b is the y-intercept

In your problem there is no b value so we can set the b value at 0

y=-3x+0

This means that the line crosses the y axis at 0
 therefore the y-intercept is 0

Answer 2

Find the slope of the straight line that passes through (−3, 11) and (4, 1).