Describe what it means for a relationship to be a function. Think of a type of machine that you use on a regular basis and describe how it also operates as a function. Be sure to give examples and have a minimum of 4 complete sentences.​

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.

the least common denominator is 40

80x^8−68x^6+16^5−20x^4−4x^3+8x^2

hope i'm right lol