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Chapter 5 Section 4 Writing a Function Rule. Writing a Rule from a Table A.y = x+2B. y = x-2C. y = x+4 D. y = 2xE. y = x 2 A.y = x+2B. y = x-2C. y = x+4.

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Presentation on theme: "Chapter 5 Section 4 Writing a Function Rule. Writing a Rule from a Table A.y = x+2B. y = x-2C. y = x+4 D. y = 2xE. y = x 2 A.y = x+2B. y = x-2C. y = x+4."— Presentation transcript:

1 Chapter 5 Section 4 Writing a Function Rule

2 Writing a Rule from a Table A.y = x+2B. y = x-2C. y = x+4 D. y = 2xE. y = x 2 A.y = x+2B. y = x-2C. y = x+4 D. y = 2xE. y = x 2 xy xy xy xy xy

3 Word Problems A carpenter buys finishing nails by the pound. Each pound of nails costs $1.19. a. Write a function rule to describe this relationship. b. How much will 12lb of finishing nails cost? A carpenter buys finishing nails by the pound. Each pound of nails costs $1.19. a. Write a function rule to describe this relationship. b. How much will 12lb of finishing nails cost?

4 Word Problems Suppose you borrow money from a relative to buy a lawn mower that costs $245. You charge $18 to mow a lawn. Write a rule to describe your profit as a function of the number of lawns mowed. (total profit) = $18 times (lawns mowed) - (cost of mower) n = number of lawns mowed P(n) = total profit P(n) = 18n Suppose you borrow money from a relative to buy a lawn mower that costs $245. You charge $18 to mow a lawn. Write a rule to describe your profit as a function of the number of lawns mowed. (total profit) = $18 times (lawns mowed) - (cost of mower) n = number of lawns mowed P(n) = total profit P(n) = 18n - 245

5 Assignment Page 256 Numbers 1-21 odd Page 256 Numbers 1-21 odd


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