Question

The toll for trucks to cross a certain bridge is a total of $2 for the first two axles plus $2 for each additional axle. What function would give the toll , T(n) , in dollars, for a truck with n axles.

Answer 1

I got T(n) = 2n+2 but that isn't right! Why?

Answer 2

T(n)=2+(n-2)*2=2+2n-4=2n-2

Answer 3

Where did you get n-2 @sauravshakya ?

Answer 4

There are n no. of axles.... for the first two it cost 2...... Now, there are (n-2) remaining axles which cost 2 per axle

Answer 5

got it?

Answer 6

Ohhhhhh That makes a lot of sense! Thanks!

Answer 7

WELCOME