What is the answer to 17 and 18?

The function models the number of accidents per 50 million miles driven as a function

Given that y varies directly to the square root of (x + 1), and that y = 1 when x = 8,(a)express y in terms of .x,(b)find the value of y when x = 3,(c)find the value of x when y = 5.

Which rule describes the composition of transformations that maps △abc to △a”b”c