Exit Ticket Lesson 7-1

Kimmie sells custom T-shirts for $12 each at the flea market every Saturday. She usually sells 36 T-shirts. Kimmie surveys her customers about whether they would buy her T-shirts at a different price. She determines that for every $1 increase in price, she would sell two fewer T-shirts, and for every $1 decrease in price, she would sell two more T-shirts.

Which quadratic function can Kimmie use to model price increments vs. total income, so that she can find the price at which her income is maximized?

• f(x) = (12-x)(36 +2x)

• f(x) = (12 +2x) (36 -x)

• f(x) = (12 +x) (36-2x)

• f(x) = (12- 2x)(26 +x)

Farmer Brown has 360 feet of fencing to use to construct a rectangular enclosure for his prized goats.

Which equation gives the area A as a function of the width w of the enclosure?

• A(w) = 180 -w²

• A(w) = 360 -w²

• A(w) = 180w - w²

• A(w) = 360w - 2w²

The vertex of a parabola is

• is the point at the intersection of and its line of symmetry

• the minimum or maximum of the graph

• the straight line

• the maximum of the straight line