Find the slope(s) twice, first the slope of the line connecting (2,4) and (4,8) and then the slope of the line connecting (2,4) and (8,12). If you get different slopes, then it'd be safe for you to conclude that the points do not lie on the same line.
R is also known as the correlation coefficient. Hence your statement is ...
B. False
Nine wholes with five twelves
9 5/12
Circle A -- center(2, 0), radius 8 Circle A' -- center(-1, 5), radius 3
The answer is c to your question