What is trendline?

A trendline is like drawing a straight path that shows how something goes up or down over time.

Imagine you're playing with your favorite toy car on a ramp. If the ramp gets steeper, the car zooms faster, that’s going up. If the ramp gets flatter, the car slows down, that’s going down. A trendline is like drawing a line between where the car starts and where it ends up, showing how fast or slow it went overall.

Think of a chart with dots that show how much candy you eat each day. Sometimes you eat more, sometimes less. A trendline helps connect those dots so you can see if you're eating more candy over time, like when you're getting closer to your birthday!

A trendline isn’t just for candy. People use it to see how the weather changes, or how a plant grows, or even how much money you save each week. It helps you spot patterns and guess what might happen next, like knowing that if your toy car keeps going faster on steeper ramps, it might soon zoom right off the table!