What is the value of the function y=1/8 x-13 when x=-4
To find the value of the function when x = -4, simply substitute -4 for x in the function and solve for y:
y = (1/8)(-4) - 13
y = -1/2 - 13
y = -13.5
Therefore, when x = -4, the value of the function y = 1/8x - 13 is -13.5.