Think you’ve got your head wrapped around Rational Functions? Put your knowledge to
the test. Good luck — the Stickman is counting on you!
Q. If y varies directly with x, then if x decreases, y does what?
Remains constant
Becomes zero
Increases
Decreases
Not enough information is given
Q. If a varies inversely with b, then if b decreases, a does what?
Remains constant
Becomes zero
Increases
Decreases
Not enough information is given
Q. If f varies directly with g, what happens to f when g doubles?
Quadruples
Doubles
Triples
Halves
Remains constant
Q. If y varies directly with x, and y = 10 when x = 2, find k.
5
10
2
20
12
Q. If y varies inversely with x, and y = 20 when x = 4, find k.
20
4
16
24
5
Q. Given a = 3bc, what's the value of a when b = 5 and c = 10?
50
150
15
18
25
Q. Which equation represents inverse variation?
f = 10g
z = 10xy
s = 20t
Q. Given 
with c = 100 when d = 25, find k.
with c = 100 when d = 25, find k. 2500
4
100
25
125
Q. Given z = kxy with z = 900 when x = 30 and y = 3, find k.
90
100
10
27
133
Q. The equation f = 2gh is what type of variation?
Direct
Inverse
Joint
Combined
None of the above