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

1 Answer

Jul 10, 2015

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

Explanation:

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

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

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

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

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

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

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