Answer:
Explanation:
First you have to see the relation change on each side. So for x we can see increasing by 1, and for y we also see that its increasing by 1. So slope is m=1/1= which is 1. Then we use the slope intercept form which is y=mx+b. So y is 3 because we are using the first points. So, y is 3=1(1)=b. 3=1+b. Subract 1 from 3 and we are left with 2=b. So the equation is y=1x+2 or f(x)=1x+2.