Question

If y = -7 when x = -21, what is the value of x when y = 9? (assume proportional relationship)

Answer 1

To find the value of x when y is 9 in a proportional relationship, we can set up a proportion using the given information.

Step-by-step explanation:

In a proportional relationship, the ratio between the values of x and y remains constant. To find the value of x when y is 9, we can use the given information to set up a proportion.

First, let's set up the proportion:

-7/-21 = 9/x

We can simplify the left side of the equation:

1/3 = 9/x

To solve for x, we can cross-multiply:

x = 27.