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How do you find five ordered pairs of $4 x - y = 8$ $4x - y = 8$ ?

1 Answer

Oct 20, 2017

See below for method and sample pairs

Explanation:

If $4 x - y = 8$ $4x-y=8$
then $y = 4 x - 8$ $y=4x-8$

Choosing 5 arbitrary values for $x$ $x$
$XXX$ $color(white)("XXX")$ (I chose {0,1,2,3,4})
and solve for corresponding values of $y$ $y$

${: (ul(x),ul(y=4x-8)), (0,-8), (1,-4), (2,color(white)("x")0), (3,color(white)("x")4), (4,color(white)("x")8) :}$

would give the 5 pairs:
$(0,-8), (1,-4),(2,0),(3,4),(4,8)$

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