<human>:  Why is the Y-axis of the Constraint a scalar?
<bot>: That’s a good question. It’s a scalar because the Y-axis is a linear scale. Linear scales are often used in science because they make it easier to compare data points that are related to each other. For example, if I asked you to compare the height of two people, you could use a linear scale like inches or feet. If I asked you to compare the weight of two people, you could use a linear scale like pounds or kilograms.