Vi P \.3
5. Below is a chart of the water depth in a harbor during a typical
24-hour day.The water level risesand falls with the tides
Effect of the Tide on Water Depth
HoursSinceMidnight 0
1
2
3
4
5
5
7
8
Depth(m)
10.1 10.6 11.5 1 3 . 2 '14.5 1 5 . 5 16.2 15.4 14.6
HoursSinceMidnight 9
10
11 12
13
14
15
16
't2.9 11.4 1 0 . 3 1 0 . 0 1 0 . 4 11.4 1 3 . 1 14.5
Depth(m)
HoursSinceMidnight
Depth(m)
17
18
20
19
21
22
23
24
15.4i 16.0 1 5 . 6 14.3 1 3 . 0 11.6 10.7 10.2
a. At whattime is the waterthe deepest?
Findthe depthat that time.
At- 6 ho^,cs alter ...'rd^.,g\\ (o. 6^*) ,! is \6.2
^n
b. At whattime is the waterthe shallowest?
Findthe depthat that
time. Ar y\ooq \t
\s o".\g tO.O,-r.
c' Duringwhattime intervardoesthe depthchange
mostrapidry?
Thq dcph chs^ge\ r:rcsS\ co.s.d\g (O:S
t.-t ...)
in
3
p\ar,es--
2-.a,rr-ba.r"
8 r*r-Q'c,*^
2pubpr.a
(2tob)
(Bt6q;
(1r\,rorS)
d. Make a coordinategraph of the data.Describethe overall pattern
you see.
\.o
Therq
See,\i
be, o- Fcrt-\er.'.. r).ot
it- s.o\-es (o Vrr.r to
rire qnd +e^ (s\rr
r<>T".\t crr.d so cr,.. .
HarborWater Depth
,!'ot'
l t a 'o
HourssinceMidnight
e. How did you determinewhatscaleto usefor your graph?Do you
think everyonein your classusedthe samescale?
Ans,.rrert
*:
t'te'\:5
vqrs-
tle \iqFert
t \ad
to
sFace
or.n. ,r.rq vo.\.re.i
r-..u+.krns,,rc,.-kl hr
tlot
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ol ,-_* o.xe \. \Vr
tle
S.i*-e,
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tc<i\q toe.cc-wJq \.o.,
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24. The graphbelowshowsthe resultsof a surveyof peopleover age25
who hadcompleteddifferentlevelsof education.
$50,000
-'t "
f45,ooo ' t
t40,000
F $35,ooo
I
ii
,i
rl
I
r
.I
:'
t
-t
o
-g
o $30,000
rn
C
\ i ? \.5
I'
$25,000
.g
It $20,000
o
E $15,000
?!
$10,000
* r-*
I
i
iil
il
$5,ooo
$o
i"
;
-" l- ' --j- " r--tl
ri :
i -1
t:
.
__
. i
-
t3 14 15
01
a. Make a table that showsthe information in the graph.,
b. After how many yearsof educationdo salariestake a big jump?
Why do you think this happens? T\q b.gXer\ \".cre,,o-se!sGrq olq. \2 .^d \b
'.r p.obab\3 \eco^rse
*ose
o.e t\e_
15e<rrs. \\.r
\5ea,-s ,.*,\e.^ 15o.,
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o. d€..e
s\og\d \ua\.C*- gos \.,- o. Vrgxqrr
Po\r.^s
30b.
Do you find it easierto answerpart (b) by rookingat the graph
or
at your table?Explain'
Ans,.r.e, s {o15 br*" r^ur, prob..b\5
eo-riqr,\ to see,
$:
$e
G.o.,..
trs p6,^ig
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a- \a\\e g>.,,c\
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ca'{..,1.,\ \:}"e' o-.,.r.\. o} i-<vec^se
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\ i P t. \
26, The number of nourc of daytightin a day
changes
*
throughoutthe year.We saythat the daysare
"shorter" in winter and ,,longer,'insummer.The
table showsthe number of daylight hours in
Chicago,Illinois,on a typical day during each
month of the year (Januaryis month 1, and so on).
a. Describeany relationshipsyou seebetween
the two variables.i
T\e \ovct t d.$\ig\r
o.cq \eo.sL i,\
.los o...d bec. \\c.4
crce qc€a\ast ia
J,..q. T\e x,ot,.. oForighi.
l**a
rnort
Daylight Hours
'o _1s (\ r.s \.) Dt: ieu .- \ro"
{<o
o^d
\E
Oc\-
b. On a grid,sketcha coordinate
graphof the
data.put monthson rhex_axis
ind daytight
hourson they_axis.
Whatputt"_, do you see?
Daylightin chicago
€
[.ep.i oe
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t .
.
o
cl
8
o
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5
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=o-t.ri,"L.\.-3
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ge-L. l^ J,r].-
T-\€.F. s\e...
&crt.re
l*\S$..ti.
L)e.ces-ber.
2458
\.r..o =o
Month
c. The seasonsin the southernhemisphere
are
the oppositeof the seasonsin the northern
hemisphere.When it is summerin North
America,it is winter in Australia.Chicago
is
about the samedistancenorth of the equator
as Melbourne,Australia,is south of the equator.
Sketch a gj3plt showing the relationship you
would .*ffiio
find belweenthe month and
the hours of daylight in Melbourne.
5.{-'
Daylight in Mefbourne
g'S-'-;^gf
€
.9 12
o
o
I
o
e
t
0
I
O
4
oo-T
d' Put the (month,daytight)varuesfrom your graphin part (c) into
a
table.
46810
Month
t
G)."rler
A.r
-t
bog\.gr.t-
luFo.
C 9d,, $o,rc exac\. vc\.re.. *^cr,\d{G\l s\.3\t\\5 bs< \doo
t\.o.r\d ha.re \Xe Sio.,-.eovera\\ p,1-tr.rre G\
\^ou Sc.e \ere.
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