ELI5: Explain Like I'm 5

Linear transformation

Okay kiddo, have you ever played with building blocks? Imagine you have blocks of different shapes and sizes, like a square, a rectangle, a triangle, and a circle. Now let's imagine we want to transform these blocks. We can do this by moving them around and changing their shape. This is a linear transformation.

A linear transformation is like taking a shape and stretching it, squishing it, or flipping it. For example, let's take our square block and stretch it vertically. The square will become a rectangle that is taller than it is wide. This is a linear transformation because it changes the shape of the square in a way that is consistent throughout the whole shape.

Another example of a linear transformation is flipping a block. If we take our square block and flip it over the diagonal, it will become a diamond shape. This is also a linear transformation because it changes the shape in a consistent way.

Now, let's talk about why we care about linear transformations. Linear transformations are used all the time in math and science to help us understand and solve problems. They are especially important in a field called linear algebra. In linear algebra, we use linear transformations to help us solve equations and understand how systems work.

Overall, a linear transformation is just like playing with building blocks, but with shapes and equations. It helps us understand how things can change and how we can use those changes to solve problems.