The lesson length (in minutes) and the cost (in dollars) of piano lessons given by nine different piano instructors are shown in the table below.
The table shows 30 minutes lesson costs 45 dollars by the first instructor, 30 minutes lesson costs 25 dollars by the second instructor, 45 minutes lesson costs 60 dollars by the third instructor, 20 minutes lesson costs 35 dollars by the fourth instructor, 60 minutes lesson costs 50 dollars by the fifth instructor, 50 minutes lesson costs 55 dollars by the sixth instructor, 60 minutes lesson costs 75 dollars by the seventh instructor, 30 minutes lesson costs 50 dollars by the eighth instructor, and 60 minutes lesson costs 80 dollars by the ninth instructor.
Which of the following scatter plots correctly displays this data?
We can represent the given data in the following table:
| Lesson Length (minutes) | Cost (dollars) |
|-----------------------|--------------|
| 30 | 45 |
| 30 | 25 |
| 45 | 60 |
| 20 | 35 |
| 60 | 50 |
| 50 | 55 |
| 60 | 75 |
| 30 | 50 |
| 60 | 80 |
To create a scatter plot, we'll plot the lesson length on the x-axis and the cost on the y-axis.
One possible scatter plot representation of this data is shown below:
```
| *
60 - + * *
|
|
50 - + * * *
|
|
40 - +
20 30 40 50 60 70 80 (Lesson Length in minutes)
```
Each point represents a pair of values (lesson length, cost). For example, the point (30, 45) indicates a 30-minute lesson that costs 45 dollars.
So, the correct answer is: Option 1.