Question

The table above shows the total number of pictures Cal took by the end of each week. Based on this pattern, which expression can be used to find the total number of pictures Cal took by the end of w weeks?

options:

2 x w


4 x w


w + 12


4 x w + 4

Answer 1

So the slope is (y2-y1)/(x2-x1)

(8-4)/(2-1)=
4/1 =
4

Aka. For every 1 week, the number of pictures taken increases by 4.



So it is 4 * w

Check:
4*w = total number of pictures
4*1 = 4
4*2 = 8
4*3 = 12
4*4 = 16

All match the table.