Is the point (2, 2.5) on the graph of y=x+2? how do you know?

Which pair of lines is parallel? a. y=4x+1 and y+4=5 b. y=-2+x and 2y-2x=-2 c. y=1/4x + 2 and y-2=1/2x d. y=1/5x+1 and 5y+x= 10

How to determine whether two known pairs of points are on the same line.

What is the perimeter of square abcd? units units 28 units 37 units