If y varies directly as x, find the constant of the variation when y =12 and x =4

To demonstrate the statement “y varies directly as x”, you will have to have this equation:

y = kx

Where k = constant of the variation

In this problem, you have to substitute the value of x and y to calculate for the constant.             

12 = k (4)

k = 3

exa:

)

3+11

14

step-by-step explanation:

from this example, we can see that subtracting with integers is the same as adding the opposite. we can solve using a number line or by using the saying "keep, change, change" to us solve. it is important to remember that we can subtract a negative and end up with a larger number than we started with.