Question

A student thinks that (1, 2) is a solution to y = 2x - 3. While checking the solution, the student gets 1 = 2(2) -3. What error did the student make when entering the values of x and y?

Answer 1

He put in the value of x into y
and the value of y in x
if that confuse you here this is what it will look like
(x,y)->(y,x)