What is the perpendicular y=-1/7 x-4 ?

The perpendicular y=-1/7 x-4 is y=7x+b

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perpendicular y=-1/7 x-4

perpendicular

y = - \frac{1}{7} x - 4

y = 7 x + b

Solution steps

Find the slope of

y = - \frac{1}{7} x - 4 : m = - \frac{1}{7}

Compute the slope of the perpendicular line:

m_{p} = 7

Line with slope m=

7 : y = 7 x + b

y = 7 x + b

y = x + 8

f (x) = (2 x + 5)^{3} - 6

f (x) = 2 x^{2} - 8 x + 9

x^{2} - 4 x - 21

x + 1 - x