Have you ever seen a plant grow? It starts as a little seed and then, over time, it gets bigger and bigger. This is an example of linear growth.
Linear growth means that something is growing at a steady rate over time. Think of it like climbing a ladder. Each rung of the ladder represents a certain amount of growth, and as you climb higher up the ladder, you are growing more and more.
Linear growth is different from exponential growth, which is when something grows at an increasing rate over time. For example, a virus might double in size every day, which means that it's growing exponentially rather than linearly.
So, to sum it up: linear growth is when something grows at a steady rate over time, like a plant growing taller and taller each day.