1. has three images below, because of the answer choices. 2-3. both have the same table (shown in image 4)

I'm not sure about 2-3 but I am gonna say that 1 is (a) because of the gaps in the numbers and the gaps in the points on the graph.
the gap in 1st and 2nd numbers is a pretty big gap 2nd and 3rd gap not so big but 3rd and 4th again pretty good gap

1. A, the first option. B seems like it would be correct, but it's too neat. Look at how the numbers jump on the table, 61 to 125 would be a sharp rise.

2. Yes, it's continuously going down by 12!

3. D, the last option!

Hope that helps!