How do the consecutive terms relate to each other?
Linear
Practice makes perfect
We want to identify which kind of model best describes the data: linear, quadratic or exponential. To do so we will calculate the difference between consecutive terms.
x
-3
-2
-1
0
y
-6.75
-7.5
-8.25
-9
Let's begin with calculating the first differences.
Since the first differences are all equal, the table of values represents a linear function.