Answer:
B. It is an exponential function because the y values increases by an equal factor over equal intervals of x value
Step-by-step explanation:
WE are given with a table
Let find the difference in y values and difference is x values
Difference in x value is 1
LEt check the difference in y values
21- 7 = 16
63- 21= 42
Difference in y values/ x values is not a constant . So it is not linear function
It is an exponential function
Now we consider the y values
7 *3 = 21
21 * 3= 63
63* 3= 189
We can see that y values are increasing by a factor of 3
the y values increases by an equal factor 3 over equal intervals of x value (1)
