Line segment ab has endpoints a(10, 4) and b(2, 8). find the coordinates of the point that divides the line segment directed from a to b in the ratio of 1: 4. a) (6, 6) b) (2, 56/5) c) (24/5, 42/5) d) (42/5, 24/5)

So despite what you may think, 1:4 is not 1/4 in this situation, but rather it's "1 equal part to 4 equal parts", which is a total of 5 equal parts. In short, they are asking you for the point at the 1/5 mark from A to B.

Firstly, how many units apart is 10 to 2 (the x-coordinates)? That would be 8 units. Multiply 1/5 by 8:

Next, how many units apart is 4 to 8 (the y-coordinates)? That would be 4 units. Multiply 1/5 by 4:

Now, since from 10 to 2 you are decreasing, subtract 8/5 from 10:

42/5 is the x-coordinate.

Now, since from 4 to 8 you are increasing, add 4/5 to 4:

24/5 is the y-coordinate.

Putting it together, the point is (42/5, 24/5), or D.

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