Question

the table shows the weights of apples at a grocery storeNumber of apples weight in kilograms 2 -5 0.7212 -Complete the table so that there is a proportional relationship between the number of apples and their weight

Answer 1

By "proportional relationship between the number of apples and their weight" it means that the weight depends only on the number of apples. This means, that we should find the weight of an apple and then use this to calculate the rest of table.

Assuming that apples weight the same, we know that if we have 5 apples, the total weight is 0.72. Let x be the weight of one apple. Then, we have the following equation:

`5\cdot x\text{ = 0.72 }`

Then, if we divide by 5 on both sides we get

`x\text{ = }(0.72)/(5)\text{ = 0.144}`

Once we get this result, we simply multiply this by the number of apples to get the weight. So, for two apples

`2x\cdot\text{ = 0.288}`

and for 12 apples

`12\cdot x\text{ = 1,728}`

So our final answer would be

Number of apples weight in kilograms

2 0.288

5 0.72

12 1.728