Represent functions as graphs

Algebra I – Section 1.7

Example 1

Practice 1

Example 2

SAT SCORES The table shows the average score s on the mathematics section of the Scholastic Aptitude Test (SAT) in the United States from 1997 to 2003 as a function of the time t in years since 1997. In the table, 0 corresponds to the year 1997, 1 corresponds to 1998, and so on. Graph the function.

Practice 2

Example 3

Practice 3

Hint for labeling the y-axis: On the y-axis, start at 0, skip a line and then go to 500. Then I would count by five, while skipping a line between each number. So, 500, skip a line, 505, skip a line, 510, skip a line, and so on. You make the axis the way you want them to be. JUST BE CONSISTENT.

Graph the function.Years since 2001, t 0 1 2 3 4 5Average Score, s 501 510 512 514 511 520

Step 2: Use what you know from the previous lesson to write a rule. (Look at the first input and output points. How do you get to the output from the input.)

Step 3: Check to see if the first three points work for the rule that you wrote.

Example 4

Practice 4

Summary - Ways to represent a function