Graph of a function of two variables

Okay kiddo, imagine you have a big piece of paper with lots of dots and lines drawn on it. This is called a graph.

Now, let's say you have a magical formula that can help you make a graph. But this is no ordinary formula, it needs two numbers to work! These two numbers can be anything you want, like the amount of ice cream you ate and the temperature outside.

When you put these numbers into the formula, it gives you a special dot on the graph. And when you do this for all the different combinations of numbers you can think of, it will make a really cool picture on the graph.

This picture is called a graph of a function of two variables. It helps us understand how one thing (like the amount of ice cream you ate) affects another thing (like how hot or cold it is outside).

So, next time you see a graph like this, just remember that it's a magical picture made from a special formula that uses two numbers to help us understand how things are connected!