Yes. If you can express it as a fraction (=ratio) then it is rational. 0.8 is the same as 8/10.
Answer:
The correct answer is the last option (d.)
Step-by-step explanation
The slope of the line is 3
Answer:
C. -4
Step-by-step explanation:
9514 1404 393
Answer:
B. (2, 1)
Step-by-step explanation:
As a first guess you might say the right angle will be at the point that has the x-coordinate of A (2) and the y-coordinate of B (1).
You notice that the point (2, 1) is on the list of answer choices, so that is a good choice.
The coordinates of C could be (2, 1).
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Or, you can plot the points and see what forms a right triangle.