Mathematics
TFAME
2015-11-11 12:08:57
Which of the points shown below are on the line given by the equation y = 2x? Check all that apply.A. Point A: (1, -1) B. Point B: (1, 3) C. Point C: (-2, -4) D. Point D: (-2, 4)
ANSWERS
sav
2015-11-11 15:58:23

Substitute each value of x, calculate, and if the answer equals to the given value of y, then the point does lie on y = 2x Point A (1, -1)  y = 2(1) y = 1 The answer is not y = -1 as given in the question, hence point A does not lie on y = 2x ----------------------------------------------------------------------------------------------------------- Point B (1, 3) y = 2(1) y = 2 The answer is not y = 3 as required, hence point B does not lie on y = 2x --------------------------------------------------------------------------------------------------------------- Point C(-2, -4) y = 2(-2) y = -4 The answer is y = -4 as required. Hence, point C does lie on y = 2x ----------------------------------------------------------------------------------------------------------------- Point D(-2, 4) y = 2(-2) y = -4 The answer is not y = 4 as required, so point D does not lie on y = 2x. --------------------------------------------------------------------------------------------------------------- Correct Answer: C

emmasoccer2
2015-11-11 15:59:38

The answer is not y = 4 as required, so point D does not lie on y = 2x.

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