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Elementary and Intermediate Algebra
Mark Dugopolski, Southeastern Louisiana University
Functions
Variation
Warm-Ups
1
If a varies directly as b, then a = kb.
A)
TRUE
B)
FALSE
2
If a is inversely proportional to b, then a = bk.
A)
TRUE
B)
FALSE
3
If a is jointly proportional to b and c, then a = bc.
A)
TRUE
B)
FALSE
4
If a is directly proportional to the square root of c, then a = kc
1/2
.
A)
TRUE
B)
FALSE
5
If b is directly proportional to a, then b = ka
2
.
A)
TRUE
B)
FALSE
6
If a varies directly as b and inversely as c, then a = kb/c.
A)
TRUE
B)
FALSE
7
If a is jointly proportional to c and the square of b, then a = kc/b
2
.
A)
TRUE
B)
FALSE
8
If a varies directly as c and inversely as the square root of b, then a = kc/b.
A)
TRUE
B)
FALSE
9
If b varies directly as a and inversely as the square of c, then b = kac
1/2
.
A)
TRUE
B)
FALSE
10
If b varies inversely with the square of c, then b = k/c
2
.
A)
TRUE
B)
FALSE
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