Question

The graph below represents the price of sending picture messages using the services of a phone company. What is the constant of proportionality?

A graph is shown. The values on the x axis are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The values on the y axis are 0, 22, 44, 66, 88, 110, 132, 154, 176, 198, 220. Points are shown on ordered pairs 0, 0 and 2, 44 and 4, 88 and 6, 132 and 8, 176. These points are connected by a line. The label on the x axis is Picture Messages Sent. The label on the y axis is Price in cents.
10
11
21
22

Answer 1

@dan815

Answer 2

@perl

Answer 3

@nincompoop

Answer 4

The constant of proportionality is equal to the slope in this case

Answer 5

use the slope formula

\[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]

Answer 6

? sorry but like im not smart when it comes to this stuff. do u kno the answer @jim_thompson5910

Answer 7

(x1,y1) = (0,0)
(x2,y2) = (2,44)
\[\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}\]
\[\Large m = \frac{44-0}{2-0}\]
\[\Large m = ???\]

Answer 8

44/2 ? @jim_thompson5910

Answer 9

WAIT ITS 22!!

Answer 10

very good

Answer 11

the slope is 22

so the constant of proportionality is 22