Name Date. In Exercises 1 6, tell whether x and y show direct variation, inverse variation, or neither.

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1 1 Prctice A In Eercises 1 6, tell whether nd show direct vrition, inverse vrition, or neither In Eercises 7 10, tell whether nd show direct vrition, inverse vrition, or neither In Eercises 11 1, the vribles nd vr inversel. Use the given vlues to write n eqution relting nd. Then find when. 1 6, 1. 1, 7 1., 1. The vribles nd vr inversel. Describe nd correct the error in writing n eqution relting nd. 1. The number of songs tht cn be stored on n MP pler vries inversel with the verge size of song. A certin MP pler cn store 000 songs when the verge size of song is megbtes. Find the number of songs tht will fit on the MP pler when the verge size of song is megbtes. Copright Big Ides Lerning, LLC Algebr Resources b Chpter 7

2 Nme Dte Prctice A In Eercises 1, grph the function. Compre the grph with the grph of 1 f( ). h ( ). g ( ). h ( ) 9 In Eercises 1, grph the function. Stte the domin nd rnge.. f( ) g ( ) 1 8. h ( ) f( ) 1 1. g ( ) h ( ) In Eercises 16 1, rewrite the function in the form g( ) k. Grph the h f. function. Describe the grph of g s trnsformtion of the grph of ( ) 16. g ( ) 1 1 g ( ) g ( ) 6 1 g( ) 1 0. g( ) 1 g( ) 9. Your choir is tking trip. The trip hs n initil cost of $00, plus $10 for ech student.. Estimte how mn students must go on the trip for the verge cost per student to fll to $1 b. Wht hppens to the verge cost s more students go on the trip? In Eercises, use grphing clcultor to grph the function. Then determine whether the function is even, odd, or neither. f. ( ) 1. g ( ). h ( ) Algebr Copright Big Ides Lerning, LLC Resources b Chpter

3 Prctice A In Eercises 1 6, simplif the epression, if possible In Eercises 7 1, find the product ( ) ( 1)( ) 1 ( ) ( 7)( 1) Compre the function f( ) ( 1)( ) to the function g ( ). ( 1) In Eercises 1 17, find the quotient ( ) 18. Mnufcturers often pckge products in w tht uses the lest mount of mteril. One mesure of the efficienc of pckge is the rtio of its surfce re to its volume. The smller the rtio, the more efficient the pckging. A compn mkes clindricl cn to hold popcorn. The compn is designing new cn with the sme height h nd twice the rdius r of the old cn. S. Write n epression for the efficienc rtio, V of the cn nd V is the volume of the cn. b. Find the efficienc rtio for ech cn. where S is the surfce re c. Did the compn mke good decision b creting the new cn? Eplin. Copright Big Ides Lerning, LLC Algebr Resources b Chpter 7

4 Nme Dte Prctice A In Eercises 1, find the sum or difference In Eercises 7, find the lest common multiple of the epressions.., 6 18., ( ) 6. 9, 10, 8. Describe nd correct the error in finding the sum. In Eercises 9 1, find the sum or difference In Eercises 1 nd 1, tell whether the sttement is lws, sometimes, or never true. Eplin. 1. The LCD of two rtionl functions is the sum of the denomintors. 1. The LCD of two rtionl functions is equl to one of the denomintors. In Eercises 1 18, rewrite the function g in the form g( ) k. h Grph the function. Describe the grph of g s trnsformtion of the grph of f( ). 1. g ( ) 16. g ( ) 1 g ( ) g ( ) Algebr Copright Big Ides Lerning, LLC Resources b Chpter

5 Prctice A In Eercises 1, solve the eqution b cross multipling. Check our solution(s) So fr in bsebll prctice, ou hve pitched 7 strikes out of 61 pitches. Solve the 80 7 eqution to find the number of consecutive strikes ou need to pitch to rise our strike percentge to 80%. In Eercises nd 6, identif the lest common denomintor of the eqution In Eercises 7 1, solve the eqution b using the LCD. Check our solution(s) Describe nd correct the error in the first step of solving the eqution. 1. You cn clen the gutters of our house in hours. Working together, ou nd our friend cn clen the gutters in hours. Let t be the time (in hours) our friend would tke to clen the gutters when working lone. Write nd solve n eqution to find how long our friend would tke to clen the gutters when working lone. ( Hint: ( Work done) ( Work rte) ( Time) ) Copright Big Ides Lerning, LLC Algebr Resources b Chpter 7

SEE the Big Idea. Cost of Fuel (p. 397) Galapagos Penguin (p. 382) Lightning Strike (p. 371) 3-D Printer (p. 369) Volunteer Project (p.

SEE the Big Idea. Cost of Fuel (p. 397) Galapagos Penguin (p. 382) Lightning Strike (p. 371) 3-D Printer (p. 369) Volunteer Project (p. 7 Rtionl Functions 7. Inverse Vrition 7. Grphing Rtionl Functions 7.3 Multipling nd Dividing Rtionl Epressions 7. Adding nd Subtrcting Rtionl Epressions 7. Solving Rtionl Equtions Cost of Fuel (p. 397)

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