-1
Check whether the slope between point #1 and point #2 is the same as the slope between point #2 and point #3. If it is, then they are collinear.
half 2
It is the square root of (-3-5)2+(2--1)2 = 8.544 to 3 decimal places
The point exactly halfway between ' 1 ' and ' 2 ' does.
a decimal point (2.3)
The potential difference between -1 and 2 volts is 3 volts. A potential difference of 3 volts means that there is an electric field pushing a charged particle from the -1 volt point to the 2 volt point.
It is the square root of (-6-4)2+(1-3)2 = 2 times sq rt of 26 or about 10.198 to 3 decimal places
-2
The mid point is at the mean average of each of the coordinates: The midpoint between A (6,3) and and B (8,1) is (6+8/2, 3+1/2) = (7, 2)
|AB| = sqrt[(5 - 2)2 + (7 - 4)2] =sqrt[9 + 9] = 3*sqrt(2)
A Decimal Point.
Decimal point