Constant of proportionality Unit1

Constant of proportionality

A constant ratio of two variables related proportionally

Constant OR Direct variation = y=3x: the 3 is the C.O.P.

Stays the same, number with no variable

Data tables

To find if the data table is proportional: do: y/x for each entry. IF the answer is the same for all values, then the table is proportional!

Proportional relationship

Two quantities vary directly with one another at the same rate

ratio

a comparison between two items 2 apples for every 1 orange is 2/1 or 2:1

unit rate

divide the two quantities to get to per

non proportional

does not change at a constant rate

Graph is proportional when:

the graph is a straight line or LINEAR and goes through (0,0)

ORDERED PAIR

when graphing, you plot the x first, then the y (x,y)

To find Constant of Proportionality

y/x