Use this space for
16 In the physics lab, Thelma determined the kinetic energy, KE, of an
computations.
object at various velocities, V, and found the linear correlation coefficient
between KE and V to be +0.8. Which graph shows this relationship?
KE
KE
1
1
V
V
1
( 1 )
( 3 )
KE
KE
1
V
V
1
1
( 2 )
( 4 )
17 Which equation has roots that are real, rational, and unequal?
2
−
=
2
+ + =
(1)
(3)
x
4 0
x
x
1 0
2
2
−
+
=
−
=
x
4
x
4 0
(2)
(4)
x
2 0
18 The expression cos (π – x) is equivalent to
(1) sin x
(3) cos x
(2) –sin x
(4) –cos x
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Math. B – Jan. ’08