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10 cards from this deck
Sequence of numbers/events following a specific rule
A letter representing a number that can change
Input value you can choose or control
Output value that depends on independent variable
Values increase/decrease by same amount each time
y=mx+cy = mx + cy=mx+c
Constant difference (rate of change)
Starting value (y-intercept)
Fixed cost + (Cost per item × Number of items)
Check it works with the original data
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