For the second one it is accurately 3 Why? Because the equation y=mx+b m is the slope. In this example they only give you the slope. You can also think of it as rise / run. Rise is the top number in a fraction or slope so that makes it positive because your going up. Hope this makes sense and helps.
As humans we live with math on a daily bases. If that is cooking, traveling (Ex. calculating the miles and how much gas it will use), for heath (calculating calories), etc.
