Question

The variables y and x have a proportional relationship, and y = 12 when x = 5. What is the value of y when x = 8? Enter your answer as a decimal in the box. y =

Answer 1

To find the value of y when x = 8 in a proportional relationship, we can use the given equation and solve for the proportionality constant. Then, we substitute the value of x into the equation to find the corresponding value of y.

Therefore, when x = 8, the value of y is 19.2.

Step-by-step explanation:

To find the value of y when x = 8, we can use the given proportional relationship between y and x. Since y and x have a proportional relationship, we can write the equation as y = kx, where k is the proportionality constant.

Using the values given, when x = 5, y = 12. Plugging these values into the equation, we get 12 = 5k. Solving for k, we find that k = 2.4.

Now we can substitute the value of k into the equation and solve for y when x = 8.y = 2.4 * 8 = 19.2. Therefore, when x = 8, the value of y is 19.2.