what is the value of the function y=1/8x - 13 when x= -4?
a. -15
b. -13.5
c. 16
d. -12.5
To find the value of the function y=1/8x - 13 when x= -4, substitute -4 into the equation:
y = 1/8(-4) - 13.
Simplifying the expression:
y = -4/8 - 13,
y = -1/2 - 13,
y = -1/2 - 26/2,
y = -27/2,
y = -13.5.
Therefore, the value of the function when x= -4 is -13.5.
The correct answer is b. -13.5.