The straight line passing through (-2,5) and (6,b) is perpendicular to the line 20x+5y=3 . find the value of b
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20x-3=-5y
On comparing with y=mx+c
Slope of line = - 4
If a line is perpendicular
m1×m2=-1
b-5/(6+2)×-4=-1
b-5/8=1/4
b-5=2
b=7
On comparing with y=mx+c
Slope of line = - 4
If a line is perpendicular
m1×m2=-1
b-5/(6+2)×-4=-1
b-5/8=1/4
b-5=2
b=7
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