Write and solve the equation for the direct variation y varies directly with x if y=5 when x=55 . Then find the value of y when x=22 .(1 point)

Responses

When x=22, y=110.
When x equals 22 , y equals 110 .

When x=22, y=111.
When x equals 22 , y equals Start Fraction 1 over 11 End Fraction .

When x=22, y=242.
When x equals 22 , y equals 242 .

When x=22, y=2.

1 answer

In direct variation, the relationship between \( y \) and \( x \) can be expressed with the equation:

\[ y = kx \]

where \( k \) is the constant of variation.

We know that \( y = 5 \) when \( x = 55 \). We can use this information to find \( k \):

\[ 5 = k \cdot 55 \]

To solve for \( k \):

\[ k = \frac{5}{55} = \frac{1}{11} \]

Now we have the equation for the direct variation:

\[ y = \frac{1}{11}x \]

Next, we need to find the value of \( y \) when \( x = 22 \):

\[ y = \frac{1}{11} \cdot 22 \]

Calculating that gives:

\[ y = \frac{22}{11} = 2 \]

Thus, when \( x = 22 \), \( y = 2 \).

The correct response is:

When x=22, y=2.
When x equals 22, y equals 2.