The question in the image is:
```
A cleaning spray contains 1/2 cup of vinegar for every 4 teaspoons of lemon oil.
What is the rate in cups of vinegar per teaspoon of lemon oil?
```
To solve this, we divide the amount of vinegar by the amount of lemon oil.
```
rate = 1/2 cup vinegar / 4 teaspoons lemon oil
```
We can convert teaspoons to cups by dividing by 48, since there are 48 teaspoons in 1 cup.
```
rate = 1/2 cup vinegar / (4 teaspoons lemon oil / 48 teaspoons per cup)
```
Simplifying, we get:
```
rate = 1/2 cup vinegar * 48 teaspoons per cup / 4 teaspoons lemon oil
```
```
rate = 12 teaspoons vinegar / 4 teaspoons lemon oil
```
**Therefore, the rate of vinegar per teaspoon of lemon oil is 3 cups of vinegar per teaspoon of lemon oil.**