Prove that segment de is parallel to segment ab.

Slope of AB = (0 - 0)/(x2 - 0) = 0

Slope of DE = (y1/2 - y1/2) / ((x1 + x2)/2 - (x1/2)) = 0

Both lines has same slopes and equal zero.

Two lines are parallel if their slopes are equal. So AB ║ DE

step-by-step explanation:

to find if any function is an inverse of the other, put the first equation in as x in the next one. then simplify and solve. if at the end you get the statement y = x, then it is an inverse. if you get anything else, it is not.