# SOLUTION: reasonableness: Which of the following order pairs is not included on the graph equation y=x+9 (7,16) (15,24)(20,29) (28,36)

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 Question 518690: reasonableness: Which of the following order pairs is not included on the graph equation y=x+9 (7,16) (15,24)(20,29) (28,36)Found 2 solutions by Edwin McCravy, stanbon:Answer by Edwin McCravy(8908)   (Show Source): You can put this solution on YOUR website!y=x+9 (7,16) (15,24)(20,29) (28,36) ```Let's check to see if (7,16) is included on the graph of y-x+9. The first coordinate of (7,16) is 7. That's the x-coordinate, so that's what we substitute for x. So instead of the x in y=x+9 we will substitute 7. The second coordinate of (7,16) is 16. That's the y-coordinate, so that's what we substitute for y. So instead of the y in y=x+9 we will substitute 16. So y=x+9 becomes 16=7+9 and when we add 7+9 we get 16, so we end up with 16=16 So (7,16) is included on the graph of y=x+9 ---------------------------- Next let's check to see if (15,24) is included on the graph of y-x+9. The first coordinate of (15,24) is 15. That's the x-coordinate, so that's what we substitute for x. So instead of the x in y=x+9 we will substitute 15. The second coordinate of (15,24) is 24. That's the y-coordinate, so that's what we substitute for y. So instead of the y in y=x+9 we will substitute 24. So y=x+9 becomes 24=15+9 and when we add 15+9 we get 24, so we end up with 24=24 So (15,24) is included on the graph of y=x+9 ---------------------------- ---------------------------- Next let's check to see if (20,29) is included on the graph of y-x+9. The first coordinate of (20,29) is 20. That's the x-coordinate, so that's what we substitute for x. So instead of the x in y=x+9 we will substitute 20. The second coordinate of (20,29) is 29. That's the y-coordinate, so that's what we substitute for y. So instead of the y in y=x+9 we will substitute 29. So y=x+9 becomes 29=20+9 and when we add 20+9 we get 29, so we end up with 29=29 So (20,29) is included on the graph of y=x+9 --------------------------- Finally let's check to see if (28,36) is included on the graph of y-x+9. The first coordinate of (28,36) is 28. That's the x-coordinate, so that's what we substitute for x. So instead of the x in y=x+9 we will substitute 28. The second coordinate of (28,36) is 36. That's the y-coordinate, so that's what we substitute for y. So instead of the y in y=x+9 we will substitute 36. So y=x+9 becomes 36=28+9 and when we add 28+9 we get 37, so we end up with 36=37 That's FALSE! So (28,36) is NOT included on the graph of y=x+9 So the answer is (28,36). Here's what we have shown about the graph. The black line below is the graph of y=x+9, and you see that all the ordered pairs given represent points that are included in the line graph except (28,36), which is not on the line. Edwin``` Answer by stanbon(57307)   (Show Source): You can put this solution on YOUR website!Which of the following order pairs is not included on the graph equation y=x+9 (7,16) (15,24)(20,29) (28,36) --- Answer: (28,36) ==================== Cheers, Stan H. =============