Question

The number of shirts and shorts you can buy with $30 is represented by the equation 10x+5y=30. Write the equation in function form.

Answer 1

f(x) = -2x+6

Explanation:

Given the equation 10x+5y=30, in order to write as a function form, we need to make y the subject of the formula from the given function as shown;

10x+5y=30

Subtract 10x from both sides

10x+5y - 10x= - 10x+30

5y = -10x + 30

Divide through by 5

5y/5 = -10x/5 + 30/5

y = -2x + 6

Hence the required equation in function form is f(x) = -2x+6