What exactly is a rate? how do i write it? how is it different from a unit rate

Ataxi cab charges $1.75 for the flat fee and $0.25 for each time. write an in equality to determine how many miles eddie can travel if he has $15 to spend.

Can someone answer it, and plot it, for 20 points and brainliest answer? p.s. they're the same ! : )

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary