7. Suppose y varies directly with x. If y = -3 when x = 5, find y when x = -1.

The value of y = 0.6 when x = -1.

Step-by-step explanation:

Given

To determine

Find 'y' when x = -1

As y directly with x, we express it as:

y ∝ x

y = kx

here 'k' is called the constant of variation

substituting y = -3 and x = 5 to determine the 'k'

y = kx

k = y/x = -3/5

As we have to find 'y' when x = -1

y  = kx

so substituting x = -1 and k = -3/5

y = (-3/5) (-1)

y  = 3/5

y = 0.6

Therefore, the value of y = 0.6 when x = -1.

in mathematics, a function is a relationship between two variables such that the value of one of the variables, called the dependent variable, is determined by the value of the other variable, called the independent variable. there is a specific term we use to describe the set of independent variables of a function.

associative property hopes this ! : )

step-by-step explanation: