Answer:
Cost of 3 bottles will be $7.5.
Step-by-step explanation:
Given:
According to double number line.
Cost of 4 bottles = $10
Based on this we need to find the cost of 3 bottles of water.
Solution:
Now we know that;
4 bottles = $10
1 bottle = Cost of 1 bottle
By using Unitary method we get;
Cost of 1 bottle = [tex]\frac{10}{4}=\$2.5[/tex]
So we can say that;
Cost of n bottles = [tex]\$2.5n[/tex]
Cost of 3 bottles = [tex]\$2.5\times 3 = \$7.5[/tex]
Hence Cost of 3 bottles will be $7.5.
Now we have drawn the double number line.
Bottom line(Line 1) will be number of bottles:
1 2 3 4 5 6
Top line (Line 2) will be the cost of corresponding bottles:
2.5 5 7.5 10 12.5 15
