What is the value of the function y = 1/8 13 when x = -4? (1 point)
A. -13.5
B. -16
C. -12.5
D. -15
To find the value of the function y when x is -4, we substitute -4 into the equation y = 1/8x + 13:
y = 1/8(-4) + 13
Simplifying the equation:
y = -1/2 + 13
y = -1/2 + 26/2
y = (26-1)/2
y = 25/2
Therefore, the value of the function y when x is -4 is 25/2, which is equal to 12.5. So, the correct answer is C.