Question

Emma wants to compare some cell phone plans by graphing their cost per text message. Mobilama charges a flat rate of $30 for unlimited texts. Celly-On-The-Go has no set-up charge, but it does charge $0.10 per text. Ringit Wireless only charges $0.05 per text, but it has an account charge of $15.

Explain to Emma how she can graph these cell phone plans and, describe what key features of the graphs she should consider when making a decision.
help anyone !!!!

Answer 1

@phi

Answer 2

make the x-axis the number of texts
make the y-axis the cost

Answer 3

@Lyssa123

Answer 4

I think she use a bar graph. The bottom labels should be the companies and the side labels should be the costs and payments per plan. Each company bar should be a different color.

Answer 5

i got mobilama- y=30
cell on the go-y=0.10x
ringit wireless y=0.05x+15
@phi

Answer 6

i dont think you use a bar graph though

Answer 7

k so if you look closely one is a flat price rate
in second you pay based on how much you use so constant slope
and third one is slope+intercept

Answer 8

but i dont get what graph to use though

Answer 9

to show u da she put da prices on da graph

Answer 10

do u understand now ?

Answer 11

nope im still confused

Answer 12

yes, those equations look good. If you plot them, they look like this

Answer 13

Based on the graphs, you should pick
Celly-On-The-Go if you text less than 300
and
Mobilama if you text more than 300

It never makes sense to pick Ringit Wireless because it is more expensive than Celly for less than 300 texts and more expensive than Mobilama for more than 300 texts