Answer:
Step-by-step explanation:
First, we find the ratio between the points:
[tex]m=\frac{125-25}{5-1}=\frac{100}{4}=25[/tex]
This ration means that y increase 25 units per each unit of x. So, based on this ratio we can make the sequence until x = 3.
We can show this in the table below:
x y
1 25
2 50
3 75
4 100
5 125
As you can see, in the table, the coordinate for x = 3 is y = 75, and the points is (3;75)