Line Graphs

Danny sold lemonade in summer.

He recorded his weekly earnings in a table, but he couldn't tell whether they were **going up **or **down**.

What can you do to help Dannyquickly seeif his weekly earnings were going up or down?

You can draw a **line graph **for him!

A **line graph **is a graph that has points which are connected by a line. The line shows the change in values over a certain period of time. It's best used for checking **trends or progress**.

**Tip:** Line **graphs **are different from line **plots****.** 🙈

Let's make Danny's line graph now!

👉 First, draw a **horizontal axis **and a **vertical axis. **

👉 Next, write the correct **labels **for each axis.

😎 Label the **horizontal axis **with "**Week"**, and write the week numbers on it.

😎 Label the **vertical axis **with "**Earnings"**, and write money amounts on it. The highest value on this axis should at least be the highest sale that Danny made. But it's okay to also go a little bit over, just like in our table below. The lowest value will always be $0.

When deciding which values to write on the vertical axis, think of the **best interval** to use. Interval is the difference between two values.

👇 In our example, the interval between values is $4. You can also think of the numbers on the vertical axis as multiples of 4.

🤓 Tip: Make sure that the lines that mark the values are evenly spaced.

👉 Then, write a **title **for the line graph!

Now, you're ready to plot the points on the line graph! 😁

How do you do this? 🤔

👉 First, check the table for the amount earned each week. 🤓

In **Week 1**,** ** Danny earned **$16.00**. 👍

✅ Plot a point where "**Week 1**" and "**$16.00**" meet.

The amount earned in **Week 2 **is **$12.00**. 👍

✅ Plot a point where "**Week 2**" and "**$12.00**" meet.

Can you do the same for **Week 3 **and **Week 4**?

Your graph should now have 4 points on it.

👉 The last step is to **connect the points.**

There you have it! The graph is complete.

Just by looking at the **line graph**, you can see that Danny's earnings started **going up **in **Week 2**. 👆

Suppose Danny made another line graph showing his earnings for **Weeks 5 to 8**.

Do you think you can read the information on the graph?

Let's try!

Danny's earnings forWeek 5toWeek 8are shown on the line graph below.

How much did Danny earn in **Week 5**? 🤔

That's right!

✅ He earned **$24.00**.

👆 The dot for **Week 5 **is at **$24.00****.** 😺

How much did he earn in **Week 7**?

That's right!

✅ He earned **$16.00 **during **Week 7**. 🐜

What can you say about Danny's earnings from **Weeks 5 to 8**?

You got it! His earnings started to **go down **in Week 5. 👇

He should've done something about it! 😗

Good job! 🎉

You now know how to make line graphs, and read them. 💪

Are you ready for some practice? 💪

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