SOLUTION: Hi, I need a step-by-step explanation of how to figure out which graph would answer this function. y=-2x+3 . My mathbook (Teaching Textbooks) gives me 5 different graphs and asks

Question 801839: Hi,
I need a step-by-step explanation of how to figure out which graph would answer this function. y=-2x+3 . My mathbook (Teaching Textbooks) gives me 5 different graphs and asks me to pick which one answers to the function. These are the five different graphs.
y=2x+3
A. (2,-5), (1,-1), (0,3)
B. (-3,-3), (-2,-1), (-1,-1), (0,3), (1,5)
C. (3,-3), (2,-1), (1,1), (0,3), (-1,5)
D. (2,-5), (1,-2), (0,1), (-1,4)
E. (1,-5), (0,-3), (-1,-1), (-2,1), (-3,3), (-4,5)
Thank you!
Answer by solver91311(24713) (Show Source): You can put this solution on YOUR website!

You take the x coordinate of each of the ordered pairs, substitute that value for x in the function, and do the arithmetic. If the result is the given y coordinate, then the point is on the graph of the function, otherwise not.

Hint: In any given set of ordered pairs, you only have to find one that doesn't make a true statement when you substitute the coordinates. Fortunately, the first point of all of the incorrect choices makes a false statement when substituted. But you still have to try all 5 first points because you really have no assurance that there is only one correct answer.

John

Egw to Beta kai to Sigma
My calculator said it, I believe it, that settles it

The Out Campaign: Scarlet Letter of Atheism

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