# Constant of Proportionality

### We're gonna teach you about "Constant of Proportionality

## Dependent or Independent?

One species of bamboo grows at an average rate of 60 cm per day. Which one depends on the other?

Say I didn't tell you how many days the plant had grown. would you know how much the total height is? Exactly! you wouldn't know. Therefor, if you cant have height without days your days would be your independent variable and your height would be the dependent variable.

## Rate of Change

So if I made a table graph and I said "If its been 5 days, how many centimeters would it have grown? How would you graph it?

First you would multiply 5 by 60 and you would get a total of 300 and put that number into the right column of your graph. You would do the same process every time for every different amount of days you would have.

## Graph

## intro into graph Now that we know how to spot independent and dependent variables, found the rate of change and made a table graph, its time to make a line graph | ## our graph So as you can see, our graph goes through the origin so that it can be at a constant rate and that the y-axis is counting by 60's. Our website that we used didn't let us plot our points. But all you have to do to get the plot points is to take your fingers and see where they meet, like a game of battleship! :) | ## end of presentation And now you know all about the constant of proportionality. :) |

## intro into graph

Now that we know how to spot independent and dependent variables, found the rate of change and made a table graph, its time to make a line graph

## our graph

So as you can see, our graph goes through the origin so that it can be at a constant rate and that the y-axis is counting by 60's. Our website that we used didn't let us plot our points. But all you have to do to get the plot points is to take your fingers and see where they meet, like a game of battleship! :)