Decide whether the function is one to one.

y= - (x+3)^2-8

  it is NOT one-to-one

Step-by-step explanation:

A one-to-one function must pass the vertical line test (in order to be a function) and the horizontal line test (in order to be one-to-one).

No even-degree polynomial function will pass the horizontal line test. This function is even degree (2), so is not one-to-one.

example 2 – simplify: step 1: completely factor both the numerators and denominators of all fractions. step 2: change the division sign to a multiplication sign and flip (or reciprocate) the fraction after the division sign; essential you need to multiply by the reciprocal. step 3 : cancel or reduce the fractions.