1.
If
w
varies directly as
z
and
w
= 9 when
z
= -6, find
w
when
z
= 3.
A.
-4.5
B.
-2
C.
4.5
D.
0
Hint
2.
If
y
varies directly as
x
and
y
= 2 when
x
= 4, find
x
when
y
= 4.
A.
8
B.
16
C.
2
D.
4
Hint
3.
Simplify
A.
B.
C.
D.
Hint
4.
Solve
.
A.
-3, 1
B.
1
C.
-3, -1
D.
0, 1
Hint
5.
Simplify the expression
.
A.
B.
C.
D.
Hint
6.
Simplify
.
A.
B.
C.
D.
Hint
7.
Find the slope of the line that passes through A
and B
.
A.
B.
C.
D.
Hint
8.
If the rational expression of a function in simplest form is defined for
x
=
a
, but the original function is undefined for
x
=
a
, what happens at
x
= a?
A.
There is a point discontinuity.
B.
f
(
a
) = 0
C.
There is a vertical asymptote at
x
=
a
.
D.
There is a vertical asymptote at
x
= 0.
Hint
9.
Which of the following functions has a hole
and
a vertical asymptote?
A.
B.
C.
D.
Hint
10.
What type of function is
?
A.
inverse variation function
B.
square root function
C.
absolute value function
D.
direct variation function
Hint
11.
Which function does not have a value of 1 when
x
= 1?
A.
B.
C.
D.
Hint
12.
John ran a marathon on a windy day. He ran the first 13 miles into the wind, and the last 13 miles with the wind at his back, and he completed the course in 3 hours. How fast is John in still conditions if the wind speed was 4 miles per hour?
A.
–1.6 mph
B.
10.2 mph
C.
12.7 mph
D.
8.7 mph
Hint