Question

graph the solution of y-2>1 on a number line

Answer 1

y-2>1
Add 2 both sides. this is done to get only y on one side.
Then u get
y-2+2>1+2
y>3
Plotting this on number line.
put a circle at number 3.
Since y is greater than 3 darken the part of line that is on the right of 3.

Is it clear?