Question

Susan is looking into a new cell phone carrier. She researches her options and finds the two companies which have the best reception in her neighborhood offer very different monthly plans. Write a function rule which represents each company’s monthly fees.

A) Company A offers unlimited minutes and texts for a flat fee of $50 per month and charges $1.50 for each GB of data used per month.

B) Company B offers unlimited minutes and texts for a flat fee of $35 per month and charges $5.00 for each GB of data used per month.

Answer 1

get to ya in a few min

Answer 2

Okay, so lets look at Company A.
50$ per month for unlimited minutes and texts. since this is per month, and we are finding the function per month. We can have the y-intercept in this function equal to 50.
Now $1.5 per GB so this is our slope.

SImilarly for Company B
$35 per month for unlimited minutes and texts. since this is per month, and we are finding the function per month. We can have the y-intercept in this function equal to 35.
Now $5 per BG so this is our slope for this function.

Can you now write out the functions for both companies knowing the slopes and y-intercepts?

Hint: use slope intercept form, where y = mx+b

Answer 3

50=1.5x+35

Answer 4

@darkknight

Answer 5

well we have 2 different functions. So the first one would have a slope of $1.5 and a y-inter of $50.
The second function will have a slope of $5 and a y-inter of $35.

Answer 6

You have your slope and y-intercepts for BOTH functions so you can make 2 functions.

Answer 7

50=1.5x

35=5x

Answer 8

@Hero @Vocaloid

Answer 9

No @zarkam21 you have the slope. Do you know what the y-intercept is?
y=mx+b?

Answer 10

isn't it $50?

Answer 11

yes. Then why do you have that for y. Y intercept in y = mx+b is b

Answer 12

y=1.5x+50

y=5x+35

Answer 13

Yes there you go. remember both are in dollars
Keep up the good work

Answer 14

thank you so much!

Answer 15

np
I am the darkknight