There has been 28 years since 1985 to 2013, this becomes your x value. Plug x into the equation:
f(x) = (.65*28)+24.75
f(x) = 18.2+24.75
f(x) = 42.95
The simplest form would be... x minus 27 divided by 9. This is of course if the slash in your problem is relevant to division. If the slash is not necessary the answer would then be... x-27+9
Hope this helps
The answer would be 240,000
The answer is D because the lines were curving at the bottom of the triangle