Saturday, February 15, 2014

find four solutions of the equation write the solutions as order pairs y=-3x-6

We can answer this question by constructing a table of values, picking values for x, substituting those values in, and calculating the y value - frequently people like to use a table that looks like this


x|-3x-6   |y ordered pair is (x,y)


0|-3*0-6 |-6 ordered pair is (0,-6)


1|-3*1-6 |-9 ordered pair is (1,-9)


2|-3*2-6 |-12 ordered pair is (2,-12)


3|-3*3-6|-15 ordered pair is (3,-15)


4 solutions to the equation written as ordered pairs are (0,-6), (1,-9), (2,-12), (3,-15) These solutions can be checked by substituting both the x and y value into the original equation and doing the calculations. Both sides of the equation should end up the same, like this.


-15=-3*3-6 =>-9-6=>-15 and -15=-15 checks


please note, there are an infinite number of possible solutions. I chose 4 easy to work with small integers, but any integers could have been chosen to use for x. You could pick, 5, 6, 8, 15, 23, 105, -2, -10, etc...any numbers, and you would have gotten the corresponding y value, for instance, x = -10 then -3*-10-6 => 30-6 => 24 so the ordered pair solution for x = -10 would be (-10,24)

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