Question

Identify an equation in point-slope form for the line perpendicular to y = –4x – 1 that passes through (–2, 7).

Answer 1

he slope perpendicular to y=-4x-1 is the negative reciprocal, or  \frac{1}{4} .

We want it to pass through the point (-2,7).

y-7= \frac{1}{4}[x-(-2)]

Hope this helps! :^)

Answer 2

To get a perpendicular line, your slopes will equal -1 when multiplied...this means if we multiply - 4 x (1/4), we get out slope to use for the next step.

Y - Y1 = M(X - X1)    passes through (-2, 7)
Y - 7 = 1/4(X - (-2))
Y - 7 = 1/4(X + 2)
Y - 7 = 1/4X + 1/2
   +7              + 7
Y = 1/4X + 7.5