7.

Write an equation of the direct variation that includes the point (–10, –17).

1 answer

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

\[ y = kx \]

where \( k \) is a constant.

To find the constant \( k \), we can use the given point \((-10, -17)\). Plugging in these values into the equation gives:

\[ -17 = k(-10) \]

Now, we can solve for \( k \):

\[ -17 = -10k \]

Dividing both sides by -10:

\[ k = \frac{-17}{-10} = \frac{17}{10} \]

Now that we have \( k \), we can write the equation of direct variation:

\[ y = \frac{17}{10}x \]

Thus, the equation of the direct variation that includes the point (-10, -17) is:

\[ y = \frac{17}{10}x \]