Answer:
16.79 %
Step-by-step explanation:
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x=-18 if its right please give 5 stars so I can rankup
You're trying to find constants

such that

. Equivalently, you're looking for the least-square solution to the following matrix equation.

To solve

, multiply both sides by the transpose of

, which introduces an invertible square matrix on the LHS.

Computing this, you'd find that

which means the first choice is correct.
Answer:
Both questions are true.
Step-by-step explanation:
The general mathematical equation of a line can be written as
.
If we rearrange the two equations given in the question as follows:
and 
We can see that they follow the general equation we defined earlier so we can say that they represents linear lines.
The
given in the second question also represents a similar linear line with a different slope.
So the two questions are both true.
I hope this answer helps.