Question

x+5y=-20

Answer 1

What are you asked to do?

Answer 2

Sketch it @mathstudent55

Answer 3

An easy way is to do it by intercepts. Calculate the points where the line crosses the x- and y-axes. Then plot those points and draw a line through them. This is easier than it sounds.

Any point on the x-axis has ordered pair (x, 0). The y-coordinate is zero.
Any point on the y-axis, has ordered pair (0, y). The x-coordinate is zero.

To get the x-intercept, let y = 0, and solve for x:
x + 5y = -20
x + 5(0) = -20
x = -20
Ordered pair (-20, 0)

To get the y-intercept, let x = 0 and solve for y:
x + 5y = -20
0 + 5y = -20
5y = -20
y = -4
Ordered pair (0, -4)

Now plot those two points, draw a line thourgh them and extend it. There's your graph.