So basically on the y-axis, which is the vertical line, u will make a point on 4, and that point is where your line will go through. And then 3 is the slope ur line will be going in, meaning that the line will go up 3 square units, or number, while only going one square unit to the right. It's going up and right because it's a positive number. So it should look like this:
Their ratio would be: Cookie / Donut = 4/3 Let, the amount of money earned from Donut = x It would be: 4/3 = 375 / x x = 375/4 * 3 x = 1125/4 x = 281.25