How do you graph $x-y=7$ by plotting points?

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Answer 1 · 2015-11-30T08:38:15

Convert the equation to slope-intercept form. Determine two points. Plot the points and draw a straight line through the points.

Rearrange the equation to slope-intercept form, $y=mx+b$ , where $m$ is the slope and $b$ is the y-intercept.

$x-y=7$

Subtract $x$ from both sides.

$-y=-x+7$

Multiply both sides by $-1$ .

$y=x-7$

Since this is a linear equation, only two points are needed.

Table of Points
$x=0,$ $y=-7$ (y-intercept)
$x=7,$ $y=0$ (x-intercept)

Plot the points on a graph and draw a straight line through the points.

graph{y=x-7 [-10, 10, -5, 5]}

How do you graph x-y=7x-y=7 by plotting points?