What is the value of the function y=18x−13 when x=−4 ?

−15
negative 15

−16
negative 16

−13.5
negative 13.5

−12.5

The value of the function y=18x-13 when x=-4 is:

y = 18(-4) - 13
y = -72 - 13
y = -85

So, the value of the function y=18x-13 when x=-4 is -85.