### Home > AC > Chapter 16 > Lesson 16.9.2.1 > Problem9-67

9-67.

Let $f(x)=x^2+2x-1$.

1. Evaluate and simplify $\frac { f ( 5 + h ) - f ( 5 ) } { ( 5 + h ) - 5 }$.

$\frac{(5 + h)^2 + 2(5 + h) - 1 - (5^2 + 2(5) - 1)}{h}$

2. Explain what your answer represents on the graph of $y=f(x)$.

This is a slope expression.