Mary creates a table of values for a function and plots the points. she finds that the difference in the y values is the same. what kind of function did she graph? a. linear b. quadratic c. square root d. exponential

"a. linear" is the answer.

Since the difference between each of the y values, which are the outputs, are the same, it must mean that Mary would've gotten a straight line if she graphed this function. Thus, it is a linear function.