Given the acceleration, initial velocity, and initial position of a body moving along a coordinate line at time t, find the body's position at time t.

a = 9.8, initial velocity = 5, initial position = -1

r = 4.9t2 + 5t - 1
r = -4.9t2 - 5t - 1
r = 9.8t2 + 5t - 1
r = 4.9t2 + 5t

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