Answer:
y (output) = 8
Explanation:
In a function, the input is the domain (or the set of x-values), while the output is the range (y-values).
Given the linear function, y = ⅔x - 4, and you're provided the input value of 18.
Simply substitute 18 as the value of the input, and solve for the input:
y = ⅔x - 4
y = ⅔(18) - 4
y = 2(6) - 4
y = 12 - 4
y = 8
Therefore, the output value is 8.