Question

I am finding the topic "Modelling with Functions" challenging. In particular, I have difficulties in translating a verbal model into an algebraic notation to translate a function.

One example of the problems that gives me trouble is:

A discount pass for a bridge costs $21 a month. The toll for the bridge is normally $2.50, but it is reduced to $1 for people how have purchased the discount pass.
Express the total monthly cost to use the bridge with a discount pass, f, as a function of the number of times the bridge is crossed, x. Could you please show me how you would best work this problem. Do you use a table first?

Answer 1