Answer:

Explanation:
1) The two points are:
a) On the first swing she swings forward by 18 degrees: (1, 18)
b) On the second swing she only comes 13.5 degrees forward: (2,13.5)
2) The general equation using the form given is:

3) Substitute the two points:

4) Divide the second equation by the first one:
⇒ 13.5 / 18 = B
⇒ B = 0.75
5) Substitue B = 0.75 into the first equation:
18 = A (0.75) ⇒ A = 18 / 0.75 = 24
Hence, the equation is:
