Question

What is the y-intercept of the line represented by the equation? y = –3x – 5

Answer 1

-- The "y-intercept" is the point where the graphed line crosses the y-axis.

-- At every point on the y-axis, x = 0 .

-- So the y-intercept of the line represented by an equation is the value 
of  'y'  when  x = 0.

                     y = -3x - 5

When  x= 0 :  y = -3(0) - 5  =  -5 .

The y-intercept of the line represented by that equation is  -5 .