# 7 3 Ext Graphing Equivalent Ratios and Rates

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7 -3 Ext Graphing Equivalent Ratios and Rates Lesson Presentation

7 -3 Ext Graphing Equivalent Ratios and Rates Additional Example 1: Graphing Equivalent Ratios and Rates A website earns $2 for each click on an advertisement. Make a table that shows 5 equivalent ratios for the rate $2 per click. Plot the points on the coordinate plane, and describe the pattern. Since the amount earned depends on the number of clicks, use x for the clicks and y for the amount earned to write ordered pairs: (1, 2), (2, 4), (3, 6), (4, 8), and (5, 10).

7 -3 Ext Graphing Equivalent Ratios and Rates Continued: Example 1 The amount earned (y-axis) increases by $2 for each click (x-axis).

7 -3 Ext Graphing Equivalent Ratios and Rates Check It Out: Example 1 Make a table that shows 5 equivalent ratios for the rate $3. 50/gallon. Plot the points on the coordinate plane, and describe the pattern. Number of Gallons Amount ($) 1 3. 50 2 7. 00 3 10. 50 4 14. 00 5 17. 50 Since the dollar amount depends on the number of gallons, use x for the gallons and y for the dollar amount to write ordered pairs: (1, 3. 5), (2, 7), (3, 10. 5), (4, 14), and (5, 17. 5).

7 -3 Ext Graphing Equivalent Ratios and Rates Continued: Check It Out Example 1 The dollar amount (y-axis) increases by $3. 50 for each gallon (x-axis).

7 -3 Ext Graphing Equivalent Ratios and Rates Additional Example 2: Using a Graph to find Equivalent Ratios Use the graph to find 3 equivalent ratios. Then identify the unit rate. To find 3 equivalent ratios, choose any 3 points on the graph: (2, 1), (4, 2), (6, 3).

7 -3 Ext Graphing Equivalent Ratios and Rates Continued: Example 2 Possible ratios: 1 , 2 , 3 2 4 6 The unit rate is a comparison where one of the measurements has a value of 1. In this case, set the time equal to 1 second. 3 =x 6 1 6 x =3 x= 1 2 The unit rate is 0. 5 mile per second.

7 -3 Ext Graphing Equivalent Ratios and Rates Check It Out Example 2 Use the graph to find 3 equivalent ratios. Then identify the unit rate. To find 3 equivalent ratios, choose any 3 points on the graph: (1, 2), (2, 4), (3, 6).

7 -3 Ext Graphing Equivalent Ratios and Rates Continued: Check It Out Example 2 Possible ratios: 2 , 4 , 6 1 2 3 The unit rate is a comparison where one of the measurements has a value of 1. In this case, set the time equal to 1 second. 6=x 3 1 3 x =6 x= 2 The unit rate is 2 feet per second.