Question

the total cost of buying 6 pencils can be written as the ratio 6 pencils : $3. which model represents this ratio of pencils to dollars? images of four models: first has 6 1 pencil with $1 each; second has 3 1 pencil with multiple $1; third has 6 1 pencil with $1 each; fourth has 3 1 pencil with multiple $1

Explanation:

Step1: Analyze the first model

The first model has 6 pencils and 3 groups of $1$. So pencils : dollars = 6:3.

Step2: Analyze the second model

The second model has 4 pencils and 9 groups of $1$. So pencils : dollars = 4:9.

Step3: Analyze the third model

The third model has 6 pencils and 6 groups of $1$. So pencils : dollars = 6:6.

Step4: Analyze the fourth model

The fourth model has 4 pencils and 6 groups of $1$. So pencils : dollars = 4:6.

Answer:

The first model.