How do you graph y=-x +4y=x+4 by plotting points?

1 Answer
Mar 24, 2018

Answer below.

Explanation:

The y-intercept is 4 so you graph the point (0,4).

When x=0x=0,

y=-(0)+4y=(0)+4

y=4y=4

Next, you know the slope is -xx, which is also (-1)/1x11x, so you

would go down 1 unit and right 1 unit on the graph. This method is

using (rise)/(run)riserun. Then plot the points using the slope.

color(blue)(Or)Or you can find the points algebraically,

When x=1x=1,

y=-(1)+4y=(1)+4

y=3y=3

When x=2x=2,

y=-(2)+4y=(2)+4

y=2y=2

"and so on."and so on.

graph{-x+4 [-10, 10, -5, 5]}