  Short Quiz in Math 9 illustrates situations that involve the following variations: (a) direct; (b) inverse; (c) joint; (d) combined

Mathematics

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M9AL-IIa-1

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Correct quiz answers unlock more play!  5 questions
• Q1
Suppose y varies directly as x, and y=39 when x=3. Find the value of y when x=2.
26
3
58.5
2
30s
M9AL-IIa-1
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• Q2
Suppose y varies jointly as x & z. If y = -180 when z = 15 and x = -3, then find y when x = 7 and z = -5.
-140
-4
-140
30s
M9AL-IIa-1
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• Q3
Suppose y varies inversely with x. If y = 150 when x = 2, find y when x = 25.
1,875
300
75
12
30s
M9AL-IIa-1
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• Q4
Suppose p varies directly as r, and p varies inversely as t. t = 20 when p = 4 and r = 2. Find t when r = 10 and p = -5.
4
-80
80
30s
M9AL-IIa-1
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• Q5
Suppose y varies directly as x. If y = 22.5 when x = 15, find y when x = 20.
1.5
30
337.5
16.875
30s
M9AL-IIa-1
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