so that you can always know wich number tells you to go over and wich goes up
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Lets say your ordered pair is (1,2). You would first go one to the right and then two up. If it was (-1,-2) then you would go one left and then two down.
y=mx+b is commonly referred to as slope-intercept form. It is one way to show a linear equation, where: y = the y part of an ordered pair, x = the x part of an ordered pair, m= the slope of a line-rise over run is slope, so your numerator is how many you go up, and your denominator is how many you go over-you draw these dots and then connect them, and b = the y intercept-that is, the ordered pair where the line crosses over the y axis.
the first is x and the second is y example~ (3,5) You go across 3 and up 5 just remember, run and jump!
I have a hunch that this was originally a multiple-choice question, and you haven't given us the list of choices along with the question. There are an infinite number of ordered pairs that solve this equation. Go back to the list under the question, find the ordered pair where the 'y' number is 2 more than the 'x' number, and that's your solution.
They are generally ordered by Length x Width x Height.