Use the table of values below to select the correct statement.
xf(x)-2-22861810281438
a. 
the function  f  is exponential and is growing by equal factors over equal intervals.  the growth factor  is 250%.
b. 
the function  f  is linear and is growing by equal differences over equal intervals.  the growth rate  is 2.5.
c. 
the function  f  is linear and is growing by equal differences over equal intervals.  the growth rate  is 10.
d. 
the function  f  is exponential and is growing by equal factors over equal intervals.  the growth factor  is 400%.