## anonymous one year ago 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

1. anonymous

@dan815

2. anonymous

@perl

3. anonymous

@nincompoop

4. jim_thompson5910

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

5. jim_thompson5910

use the slope formula $\Large m = \frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

6. anonymous

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

7. jim_thompson5910

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

8. anonymous

44/2 ? @jim_thompson5910

9. anonymous

WAIT ITS 22!!

10. jim_thompson5910

very good

11. jim_thompson5910

the slope is 22 so the constant of proportionality is 22