Question 859786
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Hi,
perpendicular to y = {{{green(2)x + 7}}}, new line:  m = -1/2
***Using point-slope form, {{{y - y[1] = m(x - x[1])}}} P(8,12)
y-12 = (-1/2)(x-8)
y-12 = (-1/2)x + 4
  y = (-1/2)x + 16
{{{drawing(300,300,  -20,20,-20,20, grid(1),
circle(8, 12,0.6),
graph( 300, 300, -20,20,-20,20,0, 2x+7, -.5x + 16))}}}