Since the distance from the two known coordinates are known, you can find the slope of the line (for lack of a better word) to work backwards. there is a +5 unit gap between -21 and -16, so the next number would be -26. So, without havint to do any more work, the answer is B.
Yes ok doubling dimensions
The second one because 1.5 is not perpendicular to 1.1
9(-2) + 8(3) + 1 - 6(-2) - 5(3) - 6
-18 + 24 + 1 + 12 - 15 - 6
= -2
If you're solving for the value of w, the answer would be 9
