# TSI – DP – 2 – Incorrect Answer

The answer you selected is incorrect.

To solve this problem, you need to remember that every time two variables are directly proportional to each other, the equation that models the relationship is: $y=kx$.

The first step in solving this equation is to find the value of k. To find k we have to divide both sides of the equation by x, giving us $k=\frac{y}{x}$. Plugging in -25 for y and -5 for x, finds that k = 5.

Using the value of k we can find the value of y when x = 1. Multiplying 5, the value of k, and 1, the value of x, together finds that y = 5, which is C.