Mathematics
keeba
2016-09-29 18:51:06
What is the y-intercept of the equation of the line that is perpendicular to the line y = 3/5x + 10 and passes through the point (15, –5)?
ANSWERS
chloe3
2016-09-29 23:13:33

so perpendicular lines have slope that multiply to -1 y=mx+b m=sloe given y=3/5x+10 slope is 3/5 perpendicular 3/5 times what=-1? times both sides by 5/3 what=-5/3 the other slope is -5/3 y=-5/3x+b find b which is the y intercept passes through (15,-5) input that (x,y) so x=15 and y=-5 is a point -5=(-5/3)(15)+b -5=-25+b 20=b the y intercept is 20

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