Identifying the Constant of Proportionality

C

K

Y

X

The ratio of Y to X for all points in the relationship

The difference between each X and Y value

The product of all X and Y values

The sum of all X and Y values

Add Y to X

Divide Y by X

Subtract X from Y

Multiply Y by X

4

8

24

12

y = 55 + x

y = x - 55

y = x/55

y = 55x

Divide Y by X using any ordered pair

Multiply X by Y using any ordered pair

Subtract Y from X using the first ordered pair

Add all X values and divide by total Y values

For every 4 increases in X, Y increases by 1

For every 1 increase in X, Y increases by 4

For every 4 increases in X, Y decreases by 1

For every 1 increase in X, Y decreases by 4

Find the sum of Y and divide by X

Find the product of X and Y

Divide Y by X to find the unit rate

Multiply X by the total number of items

For every 20 units of X, Y increases by 1 cent

For every 1 unit of X, Y decreases by 20 cents

For every 20 units of X, Y decreases by 1 cent

For every 1 unit of X, Y increases by 20 cents

0.75

1.50

3.00

0.25