Answer: (2,1)
Step-by-step explanation
Draw a vertical line through 1 on the x axis. This plots out the line x = 1.
Then plot the point (0,1)
How far is it from (0,1) to the vertical line? The answer is 1 unit since we move 1 unit right to go from (0,1) to (1,1).
Move another 1 unit to the right to end up at (2,1) which is the result of reflecting (0,1) over the vertical line x = 1.
Check out the diagram below. I used GeoGebra to make the graph. Desmos is another good choice I recommend.