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8 December, 19:35

Which of the following lines goes downwards from left to right?

O y = 2x + 5

O y=2x-6

O y = 2x

O y=-2x + 20

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  1. 8 December, 19:51
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    D

    Step-by-step explanation:

    A line with a positive slope goes upwards from left to right.

    A line with a negative slope goes downwards from left to right.

    The given lines are all in slope - intercept form

    y = mx + c (m is the slope and c the y - intercept)

    y = 2x + 5 has m = 2 ← positive

    y = 2x - 6 has m = 2 ← positive

    y = 2x has m = 2 ← positive

    y = - 2x + 20 has m = - 2 ← negative

    Thus y = - 2x + 20 goes downwards from left to right
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