How Can You Isolate The Term f/3? Solve Iready Asap
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When an equation is already in slope intercept form it is very simple to convert it into function notation. Suppose we have:
y
=
2
x
+
4
To convert it into function notation we just replace the
y
with
f
(
x
)
.
f
(
x
)
=
2
x
+
4
This form easily informs us that whatever we input for
x
it will impact what
f
(
x
)
equals.
f
(
x
)
=
2
x
+
4
Suppose we get an equation not in slope intercept form.
2
x
+
4
y
=
18
To turn this into function notation, we need to first rewrite it by isolating
y
.
2
x
+
4
y
=
18
2
x
−
2
x
+
4
y
=
18
−
2
x
4
y
=
18
−
2
x
4
y
4
=
18
−
2
x
4
y
=
9
2
−
1
2
x
Now we can convert it into function notation by replacing the
y
with
f
(
x
)
.
f
(
x
)
=
9
2
−
1
2
x
Try it Yourself
Write the following equation in function notation.
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