How do you find an ordered pair (x,y) of 2x-7=y?

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How do you find an ordered pair (x,y) of 2x-7=y?

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Answer 1 · 2017-01-30T13:58:32

Choose a (random) value for $x$ $x$ , then solve the equation to get the accompanying value for $y$ $y$ . These values will be the coordinates of the ordered pair.

Explanation:

Since this is the equation of a straight line, there are no restrictions on what you could choose for a value of $x$ $x$ . In "official" terms, we say the domain of the function is all real numbers.

Say you pick something simple like $x = 1$ $x=1$ . Now, insert this value, and the equation becomes

$2 - 7 = y$ $2-7=y$

or $y = - 5$ $y=-5$

This means $(1, - 5)$ $(1,-5)$ must be a point on the line, and it is also an ordered pair that satisfies the equation.

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How do you find an ordered pair (x,y) of 2x-7=y?

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