Question

graph y=2x+3 and its inverse.

Answer 1

line goes through x = 0 and y = 3 ,
or (0,3)
line goes through x = 5 and y = 13 ,
or (5,13)

Answer 2

now inverse
x=2y+3
or
2 y = x - 3
y = (x/2) - 1.5

when x = 0, y = -1.5
when x = 6, y = +1.5