Pls help and explain why

△cde maps to △stu with the transformations (x, y) arrowright (x − 2, y − 2) arrowright (3x, 3y) arrowright (x, −y). if cd = a + 1, de = 2a − 1, st = 2b + 3 and tu = b + 6, find the values of a and b. the value of a is and the value of b is .

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64

Which of the following graphs could represent a cubic function?