Mathematics
14 Online
OpenStudy (anonymous):
plz help!!!!!!
Graph each of the following linear equations on the same coordinate plane and show the solution point
y = -2x + 3
y = 3x - 7
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OpenStudy (jdoe0001):
for each, pick two random "x" inputs
to get the "y" outputs
is a LINEar equation, thus it makes a line, and to plot a line, all you need is two points
OpenStudy (anonymous):
ok
OpenStudy (anonymous):
then what?
OpenStudy (godlovesme):
@kale8282 help??
OpenStudy (anonymous):
yes plz!!
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OpenStudy (anonymous):
plz help
OpenStudy (godlovesme):
give me a sec @kale8282 be back promise
OpenStudy (anonymous):
ok @Godlovesme
OpenStudy (godlovesme):
im back lolol i was helping someone and i'm done
OpenStudy (anonymous):
ok
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OpenStudy (godlovesme):
so what is the y-intercept in the 1st equation?
OpenStudy (anonymous):
-2x + 3?
OpenStudy (godlovesme):
the y-intercept
y=mx+b m is slope b is y-intercept
so try again
OpenStudy (anonymous):
3
OpenStudy (godlovesme):
yes y-intercept is where the line hits the y-axis like this|dw:1421982010585:dw|
for our graph that point is going to be 3 confused?
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OpenStudy (anonymous):
ok
OpenStudy (godlovesme):
and slope is ?
OpenStudy (anonymous):
-2
OpenStudy (godlovesme):
yes -2/ 1 slope means rise/run
rise is y and run is x
OpenStudy (godlovesme):
|dw:1421982158113:dw|
that will be our coordinate grid
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OpenStudy (anonymous):
ok
OpenStudy (godlovesme):
|dw:1421982255977:dw|
since our slope is -2/1 we have to go down 2 and 1 over so far so good?