Question 1029282
The other line is 8y=-2x-18 or y=-(1/4)x-(9/4)
A line perpendicular to it has slope 4 and passes through (4,5)--negative reciprocal slope product for perpendicular lines.
point slope formula
y-5=4(x-4)
y-5=4x-16
y=4x-11
{{{graph(300,200,-10,10,-10,10,(-x/4)-(9/4),4x-11)}}}