Using your mouse identify the x,y coordinates for two points using a line segment on the photo.
Name these two points C and D.
Point D should be to the right of Point C.

Point C (x coordinate): Point C (y coordinate):

Point D (x coordinate): Point D (y coordinate):

From these two points calculate the slope and y-intercept of your line.
Remember, the origin(0,0) is the bottom left corner of the picture.