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How do you find five ordered pairs of y=-2x?

1 Answer

Jul 10, 2015

Pick 5 arbitrary values for $x$ and for each $x$ value calculate the the y value of the corresponding pair by applying the equation.

Explanation:

For example if we choose as our $x$ values:
$color(white)("XXXX")$ ${ 0, 1, 2, 3, 4}$

For $x=0$
$color(white)("XXXX")$ $y= -2(0) = 0$
$color(white)("XXXX")$ $color(white)("XXXX")$ $rarr$ ordered pair: $(0,0)$

For $x=1$
$color(white)("XXXX")$ $y= -2(1) = -2$
$color(white)("XXXX")$ $color(white)("XXXX")$ $rarr$ ordered pair: $(1,-2)$

For $x=2$
$color(white)("XXXX")$ $y= -2(2) = -4$
$color(white)("XXXX")$ $color(white)("XXXX")$ $rarr$ ordered pair: $(2,-4)$

For $x=3$
$color(white)("XXXX")$ $y= -2(3) = -6$
$color(white)("XXXX")$ $color(white)("XXXX")$ $rarr$ ordered pair: $(3,-6)$

For $x=4$
$color(white)("XXXX")$ $y= -2(4) = -8$
$color(white)("XXXX")$ $color(white)("XXXX")$ $rarr$ ordered pair: $(4,-8)$

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