1. The increase of Joy's height from six-years old up to eight-years old is about 8cm added to 110cm which is Joy's height when she was six-years old to 118cm when she was eight-years old.
2. The change in Joy's height from seven to eleven years old is, her height got added with the centimeter of 12, so her height when she's eleven years old is 127cm,
3. Her height when she was seven years old was 115cm.
4. Her height got added with the centimeter of 6 in 121cm. Therefore her height changed from 121cm to 127cm.
5. The year of 11 years old had the greatest increase in Joy's height.
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Answer
1. The increase of Joy's height from six-years old up to eight-years old is about 8cm added to 110cm which is Joy's height when she was six-years old to 118cm when she was eight-years old.
2. The change in Joy's height from seven to eleven years old is, her height got added with the centimeter of 12, so her height when she's eleven years old is 127cm,
3. Her height when she was seven years old was 115cm.
4. Her height got added with the centimeter of 6 in 121cm. Therefore her height changed from 121cm to 127cm.
5. The year of 11 years old had the greatest increase in Joy's height.
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