Hey there! :D
Find the slope first. (0,7) (1,8)
m= (y2-y1)/(x2-x1)
m= (8-7)/(1-0)
m= 1/1
m=1
Now, use those points in point slope form. (0,7) as the point.
y-y1= m(x-x1)
y-7= 1(x-0)
y-7= 1x-0
Add 7 to the other side.
y= 1x+7 <== that is in y=mx+b form
or y= x+7
I hope this helps!
~kaikers