The equation to convert Celsius
C
temperature to Kelvin temperature K is shown.
1. TEMPERATURE
!
Suppose y varies directly as r. Write a direct
variation equation that relates x and y. Then solve.
E
I
: 9,find x when !/ : 72.
16. When A : -8,/ : 8. Whatis xwhen Y : -6?
17. lf y: -5 when x : -2,what is y when x : 74?
18. If y : 2 when x : -12, find Ywhen x : -4.
15. If y
a. State the independent and dependent
variables. Explain.
{,r-*2y:-1
b. Predict the weight of a person whose body
holds 12 pints of blood.
Find the next three terms in each sequence.
20. 5, -1,0,1.5, -20,25,...
21. 5, 5, 6, B, 11., L5, ...
ve each equation by graphing.
f. {t + 2:0
7.
0:6 -
3x
9. 12x:4x +
76
the slope of the line that passes through each
ir of points.
-,8),(-3,7)
-1,7),
(8,
-1)
11.
when x
a. Write and graph an equation relating weight
and amount of blood in a person's body.
naph each equation.
3.y:4*
5. -3x:5-y
5
19. BIOLOGY The number of pints of blood in a
human body varies directly with the person's
weight. A person who weighs 120 pounds has
about 8.4 pints of blood in his or her body.
b. Determine the C- and K-intercepts and
describe what the intercepts mean in this
situation.
L u:x*2
:
(5,-2),(3,-2)
Determine whether each sequence is an arithmetic
sequence. If it is, state the common difference.
22. -40, -32, -24, -16, ...
23. 0.75, 1.5, 3, 6, 12, ...
24. 5,17,29,41.,...
13. (6, -3), (6,4)
Which is the slope of the linear
in
the graph?
--mction shown
HULTIPLE CH0ICE
25.
MULTIPLE CHOICE In each figure, only one side of
each regular pentagon is shared with another
pentagon. The length of each side is 1 centimeter.
If the pattern continues, what is the perimeter of
a figure that has 6 pentagons?
@ww
F
A
2
CZ5
_Z
DZ
_l
5
30cm
G 25cm
H 20cm
]
15cm
207
M