Question

gradient = -2 y-intercept = 5

Answer 1

what do you need help with?

Answer 2

The Gradient (also called Slope) of a straight line shows how steep a straight line is.
http://www.mathsisfun.com/gradient.html

Answer 3

If you want to get the equation of the line with gradient -2 and y-intercept 5, you can get that in slope-intercept form using the equation y =m*x + b where m is the slope and be is the y-intercept.

That gives y = -2x + 5.

@evelync