For each call, a certain phone company charges a connecting fee, and then a cost per minute after that. How much does each call's connecting fee cost?

Question

anonymous · Answer

http://media.education2020.com/evresources/2003-08-05-00-00_files/i0100000.jpg

anonymous · Answer

@lucaz

lucaz · Answer

ok, that helps

lucaz · Answer

you see that when x(minutes) is zero the cost is 18, this is the value of the connecting fee

anonymous · Answer

ok so it would be 0.18

lucaz · Answer

right.. the function for the total cost is something like this: t(x)=mx+0.18
m is the slope of the line and x is the number of minutes

anonymous · Answer

ok

lucaz · Answer

slope is change in y over change in x, the graph shows the when x increases by 2, y increases by 1, then our slope is 1/2

lucaz · Answer

the functions becomes t(x) = x/2+0.18

anonymous · Answer

so i solve it

lucaz · Answer

yeah, the problem was just to find the connecting fee, I didn't notice that =P

anonymous · Answer

oh