Mathematics
jonahkim01
2015-11-20 07:15:27
A line passes through the points (8, –1) and (–4, 2). What is the y-intercept of this line?
ANSWERS
Sones902
2015-11-20 07:57:00

y=mx+b m=slope b=y intercept alrighty, find the slope slope between (x1,y1) and (x2,y2) is (y2-y1)/(x2-x1) the slope between (8,-1) and (-4,2) is (2-(-1))/(-4-8)=(2+1)/(-12)=3/-12=-1/4 y=(-1/4)x+b find b subsitute a point (8,-1) x=8 and y=-1 -1=(-1/4)(8)+b -1=-2+b 1=b the  y intercept is y=1 or the point (0,1)

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