Question

select the correct answer.
rewrite the following equation as a function of $x$.
$680x + 10y - 1000 = 0$
a. $f(x) = 100 + 68x$
b. $f(x) = \frac{1}{100} + \frac{1}{68}x$
c. $f(x) = \frac{1}{100} - \frac{1}{68}x$
d. $f(x) = 100 - 68x$

Explanation:

Step1: Isolate the y-term

$10y = -680x + 1000$

Step2: Solve for y

$y = \frac{-680x + 1000}{10}$

Step3: Simplify the expression

$y = -68x + 100$ or $f(x)=100-68x$

Answer:

D. $f(x) = 100 - 68x$