Victory for the ACT Student Text 15e

232 • M ATH

GRAPHS OF LINEAR EQUATIONS

Š‡ ϐ‹‰—”‡ „‡Ž‘™ ‹• –Š‡ ‰”ƒ’Š ‘ˆ ™Š‹…Š ‘ˆ –Š‡ ˆ‘ŽŽ‘™‹‰ ‡“—ƒ–‹‘•ǫ

21. A school rented a hotel ballroom for a dance. The cost of the rental is $1500 ’Ž—• ̈́ͷǤͲͲ ’‡” ’‡”•‘ ™Š‘ ƒ––‡†•Ǥ ƒ…Š ’‡”•‘ ™Š‘ ƒ––‡†• ™‹ŽŽ ’ƒ› ƒ ƒ†‹••‹‘ charge of $12.50. If x represents the —„‡” ‘ˆ ’‡‘’Ž‡ ™Š‘ ƒ––‡†ǡ ™Š‹…Š of the graphs can be used to determine Š‘™ ƒ› ’‡‘’Ž‡ —•– ƒ––‡† ˆ‘” –Š‡ admission charges to cover exactly the cost of renting the ballroom? A.

20.

Test the Test If you are given the graph of a linear equation and asked to identify the equation, substitute a coordinate pair from the graph ‹–‘ –Š‡ ƒ•™‡” choices.

F. x y 2 6 + = G. x y 2 6 + = H. x y 2 6 + = J. x y 2 2 + = K. x y 3 2 − =

B.

C.

D.

E.