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Please show work and if possible explain how you did it? I've been confused over this (both questions please)

Please show work and if possible explain how you did it? I've been confused over this-example-1

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y=mx+b
m=slope
b=y intercept or where the line crosses the y axis

slope=rise/run, from left to right

so

1.
ok, so we see it is going throught (-2,1) and (-1,4)
so it hits (-2,1) and then goes up 3 and right 1
so sloe=3/1 or 3
y intercept, it hits at y=7 so
y=3x+7 is equation

2.
we gots a hit at (0,2) and (5,6) about
so goes up 4 and to the right 3 so
4/3 is slope
hits y axis at about y=2
y=(4/3)x+2
User Realli
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