Simple Functional Relationships
ISEE Upper Level Quantitative Reasoning · Flashcards · Application
ISEE UPPER LEVEL QUANTITATIVE REASONING · FLASHCARDS
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QUESTION
What is the value of
f
(
2
x
)
f(2x)
f
(
2
x
)
if
f
(
x
)
=
3
x
−
1
f(x)=3x-1
f
(
x
)
=
3
x
−
1
(simplify)?
QUESTION
What is the function rule if a table shows
(
1
,
4
)
(1,4)
(
1
,
4
)
and
(
2
,
7
)
(2,7)
(
2
,
7
)
and the relationship is linear?
QUESTION
What is the input
x
x
x
if
f
(
x
)
=
2
x
+
7
f(x)=2x+7
f
(
x
)
=
2
x
+
7
and
f
(
x
)
=
15
f(x)=15
f
(
x
)
=
15
?
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ANSWER
4
4
4
. Solve the equation
2
x
+
7
=
15
2x + 7 = 15
2
x
+
7
=
15
by subtracting 7 and dividing by 2 to find the input.
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