Erik's elevation is represented by the equation h is equal to 12 minus 0 point 75 t , and Raj's elevation is represented by h is equal to 0 point 7 5 t What does the point of intersection on the graph represent?

At the point of intersection, Erik and Raj have the same elevation at the same time. Set their elevation equations equal: 12 − 0.75t = 0.75t, so 12 = 1.5t and t = 8 seconds. Thus, both had been riding the escalator for 8 seconds when they were at the same elevation, which is choice B.

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