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Let’s check out your problem:
The quantities
x
x
x
and
y
y
y
are proportional,
x
=
8
x = 8
x
=
8
and
y
=
9
y=9
y
=
9
Find the
constant of proportionality
(
r
r
r
) in the equation.
y
=
r
x
y=rx
y
=
r
x
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Home
Math Problems
Algebra 2
Write and solve inverse variation equations
Full solution
Q.
The quantities
x
x
x
and
y
y
y
are proportional,
x
=
8
x = 8
x
=
8
and
y
=
9
y=9
y
=
9
Find the constant of proportionality (
r
r
r
) in the equation.
y
=
r
x
y=rx
y
=
r
x
General Form:
General form of direct proportion is
y
=
r
x
y = rx
y
=
r
x
.
Substitute Values:
Given
x
=
8
x = 8
x
=
8
and
y
=
9
y = 9
y
=
9
, substitute into
y
=
r
x
y = rx
y
=
r
x
to find
r
r
r
.
Equation Solution:
So,
9
=
r
×
8
9 = r \times 8
9
=
r
×
8
.
Solve for r:
Divide both sides by
8
8
8
to solve for r,
r
=
9
8
r = \frac{9}{8}
r
=
8
9
.
Calculate r:
Calculate r,
r
=
1.125
r = 1.125
r
=
1.125
.
More problems from Write and solve inverse variation equations
Question
In a direct variation,
y
=
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y=15
y
=
15
when
x
=
5
x=5
x
=
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. Write a direct variation equation that shows the relationship between
x
x
x
and
y
y
y
. Write your answer as an equation with
y
y
y
first, followed by an equals sign.
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Question
In an inverse variation,
y
=
4
y = 4
y
=
4
when
x
=
6
x = 6
x
=
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. Write an inverse variation equation that shows the relationship between
x
x
x
and
y
y
y
. Write the equation using a decimal or an integer.
_
_
_
_
\_\_\_\_
____
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Posted 1 year ago
Question
The quantity
z
z
z
varies directly with
y
y
y
and inversely with
x
x
x
. When
y
=
−
12
y = -12
y
=
−
12
and
x
=
−
4
x = -4
x
=
−
4
,
z
=
−
36
z = -36
z
=
−
36
. What is the equation of variation? Write your answer in the form
A
A
A
or
A
B
\frac{A}{B}
B
A
, where
A
A
A
and
B
B
B
are constants or variable expressions. Remember to include the value of
k
k
k
, the constant of variation, in exact form.
\newline
z
\ z
z
=______
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Posted 1 year ago
Question
Which equation describes this relationship? Remember to include
k
k
k
, the constant of variation.
a
a
a
varies directly with
b
b
b
and inversely with
c
c
c
and
d
d
d
\newline
Choices:
\newline
\[[A]a = \frac{kb}{cd}\]
\newline
\[[B]a = \frac{kbd}{c}\]
\newline
\[[C]a = \frac{k}{bcd}\]
\newline
\[[D]a = \frac{kd}{bc}\]
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Posted 1 year ago
Question
The quantity
z
z
z
varies directly with
y
y
y
and inversely with
w
w
w
and
x
x
x
. When
y
=
12
y = 12
y
=
12
,
w
=
8
w = 8
w
=
8
, and
x
=
–
5
x = –5
x
=
–5
,
z
=
–
3
z = –3
z
=
–3
. What is the value of
k
k
k
, the constant of variation?
\newline
Write your answer in the form
A
A
A
or
(
A
)
(
B
)
\frac {(A)}{(B)}
(
B
)
(
A
)
, where
A
A
A
and
B
B
B
are constants or variable expressions.
\newline
____
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Posted 1 year ago
Question
Given the substitutions
ln
2
=
a
,
ln
3
=
b
\ln 2=a, \ln 3=b
ln
2
=
a
,
ln
3
=
b
, and
ln
5
=
c
\ln 5=c
ln
5
=
c
, find the value of
ln
(
e
3
)
\ln \left(\frac{e}{3}\right)
ln
(
3
e
)
in terms of
a
,
b
a, b
a
,
b
, and
c
c
c
.
\newline
Answer:
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Question
Square VWXY is dilated by a scale factor of
6
6
6
to form square
V
′
W
′
X
′
Y
′
V^{\prime} W^{\prime} X^{\prime} Y^{\prime}
V
′
W
′
X
′
Y
′
. Side W'X' measures
12
12
12
. What is the measure of side WX?
\newline
Answer:
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Posted 1 year ago
Question
Solve for
b
b
b
in the proportion.
\newline
10
8
=
b
12
b
=
□
\begin{array}{l}\frac{10}{8}=\frac{b}{12} \\b=\square\end{array}
8
10
=
12
b
b
=
□
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Posted 11 months ago
Question
In a direct variation,
y
=
4
y = 4
y
=
4
when
x
=
2
x = 2
x
=
2
. Write a direct variation equation that shows the relationship between
x
x
x
and
y
y
y
.
\newline
Write your answer as an equation with
y
y
y
first, followed by an equals sign.
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Posted 11 months ago
Question
In a direct variation,
y
=
18
y = 18
y
=
18
when
x
=
2
x = 2
x
=
2
. Write a direct variation equation that shows the relationship between
x
x
x
and
y
y
y
.
\newline
Write your answer as an equation with
y
y
y
first, followed by an equals sign.
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Posted 11 months ago
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