The equation y=−0.0088x2+0.79x+15 models the speed x (in miles per hour) and average gas mileage y (in miles per gallon) for a vehicle. what is the best approximate for the average gas mileage at a speed of 60 miles per hour? 15.7 mi/gal 30.7 mi/gal 61.9 mi/gal 62.9 mi/gal

30.7 mi/gal is The best approximate

With a continuous thought process.

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.