12. Write a function rule in slope-intercept form for the statement: the output is one less than half of the opposite of the input.

y = (1/2)*x - 1

Step-by-step explanation:

a linear relationship is something like:

y = a*x  + b, lets find the values of a and b.

We have that the output (y) must be 1 less than half of the imput (x), then our relation is:

y = (1/2)*x - 1

the answer is c

hope this !