Question

From where did he get -2 i dont get it​

Answer 1

He got the -2 from the description since he said he was going to plug -2 to replace x to get y

Explanation:

Answer 2

He got the -2 from the prompt. X= -2. He solved for y by substituting the x. He found y and then made the ordered pair for the x=-2 and y=3. And the point would be (-2,3).