(8x + 16) – (3x2 – 3x - 15) is equivalent to expression
2 answers:
Answer:
So we have:
We will start operating the parenthesis, so we will have to pass the - to the members of these (we will have to change their sign):
We can also removee the first parenthesis, as it doesn't change the meaning if it's or if it isn't::
Now, we will group the numbers
And we can now do the operations:
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We have to see which model (quadratic or linear) best represents the data.
We can use software to fit this data set.
Linear model:
Quadratic model:
The quadratic model has a slightly better fit than the linear model.
But the value of R² = 0.176 shows that the fit is very weak, so we can conclude that this is not a good model for the data.
Answer:
Quadratic model, 0.176.
No, 0.176 is a very low R² value.
