# 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 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:

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 D. y = 2xE. y = x 2 xy 15 26 37 48 xy 11 39 636 981 xy 1 20 31 42 xy 12 24 36 48 xy 13 24 35 46

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?

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 - 245 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

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

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