Martin earns $7.50 per hour proofreading ads at a local newspaper. His weekly wage w can be described by the
equation w = 7.5h, where h is the number of hours worked.

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

well what did you do it matters what you did : )

step-by-step explanation: