Answer:
f(x) = 100 - 68x (Choice A)
Step-by-step explanation:
680x + 10y - 1000 = 0
add 1000 to both sides and subtract 680x from both sides.
10y = -680x + 1000
divide by 10 on both sides to get y (or f(x)) by itself.
y = -68x + 100
write in terms of f(x)
f(x) = -68x + 100
reorder the equation to fit answer choice
f(x) = 100 - 68x
