Question

How do you graph y = -4x + 8 on a coordinate graph?

Answer 1

Evaluate the given equation for a minimum of 2 values of `x`; plot the corresponding points on the Cartesian plane; draw a line through the points.
graph{-4x+8 [-4.26, 10, -1, 10]}

Explanation:

Typical data points to plot would be the `x` and `y` intercepts
`color(white)("XXX")x=0 rarr y=8`
`color(white)("XXX")y=0 rarr x=2`
`rArr`
`color(white)("XXX")(2,8)` and `(2,0)` are 2 points on the line

For verification purposes you might want to plot a third point,
for example `x=1 rarr y =4`
`rArr`
`color(white)("XXX")(1,4)` is also a point on the line