explanation: another word for rate of change is slope. to find the slope you count the rise/run (rise over run). that means you count how many units up and how many units across. (1, -1) is in the corner of a unit box so that’s where i like to start counting from. from there i count up and across until i find another plot that is exactly in the corner of another unit box. the next plot point in the corner of a unit box would be (2, 4). to get to that point i counted 5 units up and 1 unit across.
