The average velocity of Fabiana's is 19 km/h.
What is average velocity?
Average velocity is defined as the change in position or displacement (∆x) divided by the time intervals (∆t) in which the displacement occurs.
function of Fabiana's position is given as;
x(t) = 19t + 17, at t = 2 sec and 3 sec
x(2) = 19(2) + 17 = 55 km
x(3) = 19(3) + 17 = 74 km
average velocity = Δx/Δt = (x₂ - x₁)/(t₂ - t₁)
average velocity = (74 km - 55 km)/(3 hr - 2 hr) = 19 km/h
Thus, the average velocity of Fabiana's is 19 km/h.
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