Oh u got oddseyware lol i hat that wish i could help u dont have the suggestions bro
I don't see a b or an m in this function, but generally, a linear function is of the form ax+b. The b in this equation (not sure if it is the same as your b), controls the shift of the function. Lower b by 3, the graph shifts down by 3.
So unless there is a minus sign before b, it has to be lowered by 3. (If there is a minus sign, it has to be increased by 3).
0.56 < 0.65
or 0.56 is less than 0.65
12x12=144. Answer is 144 miles