Question

Please explain how to do this - dont just tell me the answer

Answer 1

so the x value is always on the horizontal axis. Go to the horizontal axis and locate 4. (positive 4). then (you can do this with your finger) move it up from 4 and stop when u hit the blue line. the look on the vertical axis, and check to see which number on the y axis aligns with your finger

Hope this helps!