### Home > CC3 > Chapter 1 > Lesson 1.1.3 > Problem 1-19

Use your graphs from problem 1-17 to answer the questions below.

How can the graph for the rule

be used to predict the result for an input (-value) of? How can the graph be used to predict the output ( -value) associated with an input of? Trace up from

. What is the-value of the point?Trace up from

.Trace over to the

-axis to find the-value.Trace over to the

-axis to find the-value.If you wanted an output of

for the rule , what would you need as an input?What is the

-value when?For each of the rules in parts (a) through (e) of problem 1-17, where does the graph cross the

-axis? Describe any patterns you notice.Compare the points where the graphs cross the

-axis with their equations.

In the eTool below complete the table for each part to graph each rule.

Click the link at right for the full version of the eTool: 1-19 HW eTool