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

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

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Answer 1 · 2015-09-11T11:41:45

Evaluate the given equation for a minimum of 2 values of $x$ $x$ ; 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 $x$ $x$ and $y$ $y$ intercepts
$XXX x = 0 \to y = 8$ $color(white)("XXX")x=0 rarr y=8$
$XXX y = 0 \to x = 2$ $color(white)("XXX")y=0 rarr x=2$
$\Rightarrow$ $rArr$
$XXX (2, 8)$ $color(white)("XXX")(2,8)$ and $(2, 0)$ $(2,0)$ are 2 points on the line

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

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

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