8. the scatter plot shows a hiker's elevation above
sea level over time. the equation of the trend
line shown is y = 8.77x + 686. to the nearest
whole number, predict what the hiker's elevation
will be after 145 minutes.
hiker's elevation
2,000
1,500
elevation (ft)
000
500
0
30 60 90 120
time (min)

Which statement explains how you could use coordinate geometry to prove the opposite sides of a quadrilateral are congruent? a. use the slope formula to prove the slopes of the opposite sides are the same. b. use the slope formula to prove the slopes of the opposite sides are opposite reciprocals. c. use the distance formula to prove the lengths of the opposite sides are the same. d. use the distance formula to prove the midpoints of the opposite sides are the same.