Error Analysis A question on a test asks students to find the speed at which a car travels. The graph shows a proportional relationship between the distance
traveled in miles and time in hours. Billy incorrectly says that the speed of the
1/55 car is mile per hour. What is the speed of the car? What error might Billy
have made?

step-by-step explanation: h: (- 3, 6)

m: (1, - 2)

o: (7, 6)

r: (- 9, - 2)

midpoint of hm: (- 1, 2)

midpoint of or: (- 1, 2)

therefore, b is the midpoint of both diagonals bisect each other !

to prove the diagonals are perpendicular, show that the product of the slopes = - 1

the answer is -1 for this question

step-by-step explanation: