Question 130315: To you that have answered my previous questions, thank you! They are not being mailed to me so I cannot leave a thank you note. I have two more questions before my final, if I can get help, please.
1.) Find the x-intercepts and y-intercepts for
f(x)=x^2-7x+10
I was able to get the x-intercepts as (5, 0), (2, 0)
However, I do not know how to get the y-intercepts. I plugged 0 in for x but wouldn;t that make y=(0, 0) and don't you need two for y like you have two for x?
2.) I need to know how for sure to Determine which type of function is used as a model for data, for the scatterplot graph. I have graphs to look at, yet when the line is straight I put lienear and it was wrong, and yet one with curvy lines was a linear. How do I determine correctly every time .
Thanks in advance for the help in case I do not receive an email.
Answer by stanbon(75887)   (Show Source):
You can put this solution on YOUR website! 1.) Find the x-intercepts and y-intercepts for
f(x)=x^2-7x+10
I was able to get the x-intercepts as (5, 0), (2, 0)
However, I do not know how to get the y-intercepts. I plugged 0 in for x but wouldn;t that make y=(0, 0) and don't you need two for y like you have two for x?
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y-intercept:
Let x = 0, then y = 0^2-7*0 + 10
y-intercept is (0,10)
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2.) I need to know how for sure to Determine which type of function is used as a model for data, for the scatterplot graph. I have graphs to look at, yet when the line is straight I put linear and it was wrong, and yet one with curvy lines was a linear. How do I determine correctly every time
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You need to look at the graph and the scale on the axis. By changing
the scale a line can be make to look curved and a curve can be made to look
straight.
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Cheers,
Stan H.
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