lf x varies directly as y and x=1 .2 when y=7.2 find the constant of proportionality?

To find the constant of proportionality, we can use the formula for direct variation:

x = ky

where k is the constant of proportionality.

Given that x = 1.2 when y = 7.2, we can substitute these values into the formula:

1.2 = k * 7.2

Now, solve for k:

k = 1.2 / 7.2
k = 0.16666666666666666

Therefore, the constant of proportionality is 0.16666666666666666.

The relationship between x and y can be expressed as

x = ky

where k is the constant of proportionality.

We are given that x = 1.2 when y = 7.2, so we can substitute these values into the equation to find k:

1.2 = k - 7.2

k = 1.2 / 7.2

k = 0.1667

Therefore, the constant of proportionality is 0.1667.