What would be the missing piece of information given the following information:

Find the slope of the line that passes through the points (2, 6) and (4, 10).

m = ?

a. 2

b.6

c. 1

d. 9

I think it is c.

m = change in y over change in x
m= (10 - 6)/(4 - 2)
It's not c.