How do you find the slope and the y intercept for y= 12-2/3x

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

After the seventh month of a 12-month loan: the numerator is: {(n + 11) + (n + 10) + (n + 9) + (n + 8) + (n + 7) + (n + 6) + (n + 5)} = , and the denominator is: {(n) + (n + 1) + + (n + 11)} = . therefore, the fraction is numerator/denominator (to the nearest tenth) = %

What is the lcm of 16 and 40 ? 24 and 40 ?