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NAME _____________________________________________ DATE __________________ PERIOD _________ Lesson 3 Skills Practice Functions and Equations Write an equation to represent each function. 1. Input, x 0 1 2 3 4 Output, y 0 3 6 9 12 2. y = 3x 3. 0 1 2 3 4 Output, y 0 1 2 3 4 Input, x 0 1 2 3 4 Output, y 7 8 9 10 11 Input, x 0 1 2 3 4 Output, y 2 14 26 38 50 y=x Input, x 1 2 3 4 5 Output, y 7 14 21 28 35 4. y = 7x 5. Input, x y=x+7 Input, x 2 4 6 8 10 Output, y 5 9 13 17 21 6. y = 2x + 1 y = 12x + 2 Graph each equation. 10 9 8 7 6 5 4 3 2 1 O 8. y = x + 6 y y = 4x 1 2 3 4 5 6 7 8 9 10x 10 9 8 7 6 5 4 3 2 1 O 9. y = 2x + 1 y 10 9 8 7 6 5 4 3 2 1 y=x+6 1 2 3 4 5 6 7 8 9 10x 10. ANIMALS A manatee eats an average of 70 pounds of wet vegetation each day. The equation y = 70x describes the amount y that a manatee eats in x days. Graph the function. y = 2x + 1 1 2 3 4 5 6 7 8 9 10x O 500 450 400 350 300 250 200 150 100 50 O 120 y y y = 70x 1 2 3 4 5 6 7 8 9 10x Course 1 • Chapter 8 Functions and Inequalities Copyright © The McGraw-Hill Companies, Inc. Permission is granted to reproduce for classroom use. 7. y = 4x