# Unit: Ratio, real life graphs, and rates of change

## Lessons:

8 lessons

### Understanding rate

In this lesson, you will learn understand the term 'rate' and apply it to problems.

### Conversion rates

In this lesson, you will learn about conversion rates that are in the same ratio, and those that change.

### Exchange rates with graphs

In this lesson, you will learn how to use conversion graphs to represent rates.

### Density as rate

In this lesson, you will learn that we can describe a rate of two specific variables as density.

### Speed as rate (distance-time graphs)

In this lesson, you will learn that we can describe a rate of two specific variables as speed. We will also look at distance-time graphs.

### Calculating speed, distance and time

In this lesson, you will learn to calculate speed, distance and time.

### Displacement-time graphs (Part 1)

In this lesson, you will learn the difference between distance-time and displacement-time graphs.

### Displacement-time graphs (Part 2)

In this lesson, you will think further about displacement-time graphs and when the relationship may not be linear.