Check the picture below.
now, notice, each square in the grid is 2 units, so, x = 8, y = 10 and x = 13, y = 5
-1 or -1/1, or -(vertical distance) / (horizontal distance)
the negative means is dropping, and 1/1 means, for every foot going down, it moves farther away from the kicker by 1 foot.
now, notice, each square in the grid is 2 units, so, x = 8, y = 10 and x = 13, y = 5
-1 or -1/1, or -(vertical distance) / (horizontal distance)
the negative means is dropping, and 1/1 means, for every foot going down, it moves farther away from the kicker by 1 foot.