Which ordered pair is a solution of the equation y = 3x: (–2, –9), (–8, –18), (–8, –3), (–10, –30)?

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Answer 1 · 2017-01-30T15:08:07

The ordered pair $(-10, -30)$ is a solution.

Substitute each ordered pair into the equation and see which satisfies the equality:

$color(red)(-2, -9)$ :

$-9 = 3 xx -2$

$-9 != -6$

$color(red)(-8, -18)$ :

$-18 = 3 xx -8$

$-18 != -24$

$color(red)(-8, -3)$ :

$-3 = 3 xx -8$

$-3 != -24$

$color(red)(-10, -30)$ :

$-30 = 3 xx -10$

$-30 = -30$