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Pre-Calculus Homework Solutions 62

# Pre-Calculus Homework Solutions 62 - Alternate plan y 0.95x...

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Equations of Lines Pages 147–148 Check for Understanding 1. Sample answer: Use the point-slope form where ( x 1 , y 1 ) 5 ( 2 2, 8) and m 52 } 2 5 } . 2. Sample answer: y 5 2 x 2 3, y 52 x 2 6 3. Sample answer: y 5 x 4. y 5 ¬ mx 1 b y 5 ¬ } 1 2 } x 1 4 5. y 5 ¬ mx 1 b y 5 ¬ 2 } 3 5 } x 2 2 6. y 5 ¬ mx 1 b y 5 ¬ 3 x 2 4 7. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 ( 2 1) 5 ¬ } 3 2 } ( x 2 4) y 1 1 5 ¬ } 3 2 } ( x 2 4) 8. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 5 5 ¬ 3( x 2 7) 9. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 137.5 5 ¬ 1.25( x 2 20) 10. m 5 ¬ } ( ( y x 2 2 2 2 y x 1 1 ) ) } 5 ¬ } 0 5 2 2 ( 2 3 1) } 5 ¬ 2 y 5 ¬ 2 x 1 5 11. m 5 ¬ } ( ( y x 2 2 2 2 y x 1 1 ) ) } 5 ¬ } 2 3 1 2 2 2 0 } 5 ¬ 2 1 y 5 ¬ 2 x 1 2 12. The slope of , is 2 (from Exercise 10). The line parallel to , that contains (4, 4) also has slope 2. y 2 y 1 5 ¬ m ( x 2 x 1 ) y 2 4 5 ¬ 2( x 2 4) y 2 4 5 ¬ 2 x 2 8 y 5 ¬ 2 x 2 4 13. The total monthly cost of Justin’s current plan is y 5 39.95. For the other provider, the cost increases \$0.95 for each hour of connection so the
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