Here another way to check using system of linear equations. there are two ways of doing this either by substitution or elimination but I chose to do elimination because it’s a bit easier.
You have to add all of your frequency’s together and divide by 6 for the 6 scores. your mean would be 2
210 * 60% = 126
126 + 210 = 336
So, $336 would be your answer.
Combine like terms
assuming those 2s are exponents
-3x^2+2y^2+5xy-2y+5x^2-3y^2
move all x's together all y's together and all xy's together
-3x^2+5x^2+2y^2-3y^2+5xy
combne like terms
2x^2-y^2+5xy
3 terms
1 term is negative
Which situation below has a negative correlation?
The younger the child, the more sleep they need.
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