Y-y1=m(x-x1)
y-5=10(x-1)
Y-5=10x-10
Y=10x-5
I think its x^2(18x^2 -9+4x) sorry if I’m wrong
Over this 10-minute interval, the car's average acceleration is

The MVT says that at some point during this 10-minute interval, the car must have had an acceleration of 60 mi/h^2.