I don’t remember learning this, need some help!

The data in the table represent the height of an object over time. which model best represents the data? height of an object time (seconds) height (feet) 05 1 50 2 70 3 48 quadratic, because the height of the object increases or decreases with a multiplicative rate of change quadratic, because the height increases and then decreases exponential, because the height of the object increases or decreases with a multiplicative rate of change exponential, because the height increases and then decreases

Having a hard time understanding this question (see attachment).

Ab and bc are tangent to circle d. find x is ab = 3x + 8 and bc = 26. find x