Chapter 2 - Section 2.3 - Getting Information from the Graph of a Function - 2.3 Exercises - Page 179: 18

$\text{Domain: } (-\infty, \infty) \\\text{Range: } (-\infty,2] $

Using a graphing calculator, , the graph of the given function, $f(x)= -x^2+2x+1 ,$ is shown above. Based on the graph its domain and range are as follows: \begin{array}{l}\require{cancel} \text{Domain: } (-\infty, \infty) \\\text{Range: } (-\infty,2] .\end{array}