to draw the graph ofx-y=4 find y when x=5
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Let's put this into slope-intercept form to make graphing easier. The general equation for that form is:
y = mx + b
where m is the slope and b is the y-intercept. So we'll get:
x + y = 4
y = −x + 4
The y-intercept is 4, so that's a point
(0,4) .
The slope is
−1
, so the graph will move one point down for every point it moves right. The next point we can graph is
(1,3)
. Use a straightedge to connect those two dots and make the graph. It'll look like this:
graph{-x+4 [-10, 10, -5, 5]}
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