We need to answer this question so we can move onto the next on to the next one

Given the table, we need to find the variation between two consecutive values in x and y. If the variations are constant, we can find a constant ratio between (y2-y1)/(x2-x1). If so, the table represents a linear function.
The variation in y is always 1, so ok.
The variantion in x goes like: (-7-(-3)) =4
(-1-(-3))=4
(7-1) =6 -----> Because between these two the variation changes, it wasn't generated by a linear function.
Answer: No