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The graph below shows Alisha's height above ground as she walks up the stairs.
Alisha's Walk
Height (floors)
chools
Time (min)
Marcus is walking at the same rate as Alisha. After 12 minutes he is on the ninth floor. Which
equation can be used to find y, the height above ground in floors for Marcus at x minutes?
А
-
B
y-1-}x-12)
v-9-(x-12)
cy-12 = {(x+9)
y+9 =(x-12)
D
Find the slope first, then use the "After 12 minutes he is on the ninth floor" for your "X" & "y" input.