Answer:
About 6 cents per minute
Step-by-step explanation:
Looking at the actual minutes and cost of the plan you can see this. Let's start with the first minutes given (100 with $14) which then goes to 200 with $20. There is a difference of 100 between the two and a difference of 6 with 14 and 20. If you would do 100*0.06 (6 cents) then you would see that for every 100 minutes there would be $6 being paid, in which is the difference between all the bottom numbers when going from left to right.
A more algebraic way to do this is by finding the slope from points we can make from the table (for example 100,14 , 200,20 , 300,26...). now let;s find the slope in which the two points (100,14) and (200,20) share. Using the slope formula [tex]\frac{y2-y1}{x2-x1}[/tex] we substitute in our values so that the new equation would look like [tex]\frac{20-14}{200-100}[/tex] which when adding like terms makes it [tex]\frac{6}{100}[/tex] or in this case 0.06. The slope would be 0.06 and therefore every minute that is on the phone, $0.06 will be added to the bill.
