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portielesc
02.12.2020 •
Mathematics
Please help i need this done by today
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Ответ:
there are 2 easy ways, number 2 works better with y=mx+b form equations
1. subsitute and graph points
2. find y-intercept and slope
1. subsitute
lets say you have the equation
y=3x+4
if x=3 then y= subsitute 9+4=13
so one point is (3,13)
subsitte 0 for x
if x=0 then y=4
(0,4) is another point,
plot the line with points (3,13) and (0,4)
2.
find y intercept
in y=mx+b form, b= y intercept or where the line crossses the y axis
so if you had y=3x+4 the line would cross the y axis at (0,4)
and if you had y=3x-4 it would cross at (0,-4)
m=slope
rise divided by run or (how far it goes up)/(how far it goes to the right)
slope=3/1