31-62=152+2-6(3+21)
31-62=152+2-18+126
-31 =262
Grouping 1 10 as 10 1's is the same because you have just rearranged the numbers but they equal the same
She used 2/4 pou.ds of cheese, or 8 ounces, or just a half-pound.
1. No correlation
Those things don't really relate to each other.
2. Positive correlation
The more you drive your car, the more you'll have to pay for gas.
3. Negative correlation
More people = less soda.