How to find the slope and y-intercept using a graph??????????

Mathematics

2 answers:

Musya8 [376]2 years ago

7 0

The y intercept is anywhere the line crosses the y-axis. For example on the first graph it hits 1 on the y-axis. To find the slope you use rise/run (what I call it) so find two points and find the distance in between. For the bottom left graph you'd use the point (-1,0) and (0,2). Go to the up two from (-1,0) and to the right one to (0,2) which is 2/1. So your slope is 2 (aka b). I hope that helped!

svlad2 [7]2 years ago

6 0

The y-intercept is where on the graph the line is intersecting the y=axis. Slope is in the form y=mx+b (b=y-intercept, mx=how far up and over.)

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-9x=11-20
-9x= -9
x= -9/(-9)
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2x+1=8/4
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