How do I figure this out

The graph shows the distance kerri drives on a trip. what is kerri's speed?

If a is a nonzero real number then the reciprocal of a is

Select the correct answer from each drop-down menu. consider the following polynomials equations. 3x^2(x-1) and -3x^3+ 4x^2-2x+1 perform each operation and determine if the result is a polynomial. is the result of a + b a polynomial? yes or no is the result of a - b a polynomial? yes or no is the result of a · b a polynomial? yes or no