This preview shows pages 1–2. Sign up to view the full content.
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Unformatted text preview: Sauna/us Math 122, Section 021 Worksheet 1 Show all work for full credit. 1. A local video store notices a linear relationship between the quantity of movies they
can sell and the price charged per DVD. {In particular, if the movies are priced at $12 per
DVD, the store sells 100 copies, but if they raise the price to $19 per DVD, they sell only 72 copies.
a. Find a linear function expressing the quantity q of DVDs sold to the price p per DVD.
Pinaiﬁfmdml VVI=AQ : 72400 f, [00: ~H[P_)Z) d? (:ﬂgk’ﬁi’ 3 ’4 a " s 4: Z b. What is the slope (in reduced form)? Give units. _ Li EN dollar c. Using everyday language, explain the meaning of the slope in part (b). We w\\\ 5e.\\ Ll Qmer EVE; alert/\bme we (“wee
We price low {hr 2. Recently, Sally was planning a Christmas party and trying to decide how to spend her
budget for snacks. She knows that if she buys 5 boxes of sweets, she will have enough
money remaining to buy 12 bags of chips or if she buys 10 boxes of sweets, she will have
enough for 6 bags of chips. a. Assuming all of her money is spent, express the number of bags of chips, B , she can buy as a linear function of the number of boxes of sweets, S , she buys.
gander/Faded m:£§:é;’£ (3'12. = —).2(g53 As )05
B deﬂenoir’rti' ; 4.2 342 z 4.23 + Co
B=~L23+i3 b. Find and interpret the vertical intercept of your equation in a). Q B = —).2(o)+\8 V—lnlcrcqoi : p ‘
Eu ,3» )Q 80AM speak her mime Wiselr— on, (shuns,
1 she? will gel l8 barges if?th aid /)0 Sweets. c. Find and interpret the horizontal intercept of your equation in (a). 0:4,23443 Hlnlcrceplil(l5,o)i his 18; I? Salk" Spends Mar ewim buc’fjfi' 0” 5W6“:
N "Z ska mu 3d 15 1mm J5me, ml norbﬂa‘
8: l5 3. In the Fahrenheit temperature scale, water freezes at 32°F and boils at 212°F. In the
Celsius scale, water freezes at 0°C and boils at 100°C. Find a linear equation expressing
Fahrenheit temperature F as a function of Celsius temperature C. Give units for the slope.
:Al: ,, 2/2132 ’ _
C Independenl M A? ’ /DD_O F; 32 — l8(C (>3
Fa/epmlml = 1,8 ' l~32= [.8c F=L8c+3zp 4. Decide whether the following functions are linear. Explain how you know without
ﬁnding the equation of the line. This iable W5 W1 mco/ISISlé’ﬂl' rSlope
halide/I {Jon/lib. “Ms, PIX) l6 [14$ \mmr. Jilos iable l’hb 0x COAS\$\€{\\
$\ope m: 5.Ll. Tl/NS m = 4?.8’3510 : 54 109.241. L1 :54, WI,» I?” 500 15 \meou".
m: (0,0I0‘7.2._5Ll
W? 2948’ ' ' 5. A town’s population is modeled by the following equation
P = 8000(0.97)’ people,
where t represents the number of years since 2001.
a. Find the average rate of change of the population from t = 5 to t = 8. Give units. PanS76): W = ,
Mme8‘5 3 /79.975 Wide/gar b. Interpret your answer from part (a) in relation to the town’s population. 89W?!) 200@ 445/ 2009, papalmhm ac "HMS
mm o/zcrrasac/ by m LXI/3336 0/7 M7, 975 lam/l8 E 451/) 754/. ...
View
Full
Document
This note was uploaded on 02/21/2012 for the course MATH 122 taught by Professor Kustin during the Spring '08 term at South Carolina.
 Spring '08
 KUSTIN

Click to edit the document details