Reading bar graphs: Harry Potter

At Hogwarts, there are four houses-- Gryffindor, Hufflepuff, Ravenclaw, and Slytherin. The bar chart below shows the number of house points that each house received today. How many house points did Hufflepuff receive? So if we look at this bar chart, we could assume that this column right over here is Hufflepuff, because it's the only one that starts with an H. This will be Gryffindor, this is Ravenclaw, and this must be Slytherin. And so, if we look at Hufflepuff's bar, it looks like they have 3 points scored today. So let's put 3 points. All right, let's try one more. So here they're saying, how many house points did Slytherin receive? So this is going to be Slytherin, and it looks like they received 4 points.