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anonymous

  • one year ago

Fan for answer! The table below represents a linear function f(x) and the equation represents a function g(x): x f(x) −1 −5 0 −1 1 3 g(x) g(x) = 4x + 3 Part A: Write a sentence to compare the slope of the two functions and show the steps you used to determine the slope of f(x) and g(x). (6 points) Part B: Which function has a greater y-intercept? Justify your answer. (4 points)

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  1. anonymous
    • one year ago
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    @saseal Can you help?

  2. anonymous
    • one year ago
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    You know how to find the equation of f(x)?

  3. anonymous
    • one year ago
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    Not really sorry... Is it m = y2 - y2 over x2 - x1 ?

  4. anonymous
    • one year ago
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    yes take 2 of the points and plug em into the formula \[m=\frac{ y _{2} - y _{1} }{ x _{2} - x _{1} }\]

  5. anonymous
    • one year ago
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    What do you mean when you say two points?

  6. anonymous
    • one year ago
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    Value of f(x) is your y

  7. anonymous
    • one year ago
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    so you have 3 points of the line here (-1,-5) , (0,-1) ,(1,3)

  8. anonymous
    • one year ago
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    Oh I understand what you are saying thank you, so I just plug all those in function by function right?

  9. anonymous
    • one year ago
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    yes

  10. anonymous
    • one year ago
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    OK give me a min

  11. anonymous
    • one year ago
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    you plug in the numbers into the formula for gradient

  12. anonymous
    • one year ago
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    just choose any 2

  13. anonymous
    • one year ago
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    Well I got one that is 0 - (-1) over -1 - (-5) that equals 4 would that be my slope?

  14. anonymous
    • one year ago
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    yea so the line equation we have now is \[f(x) = 4x+c\]

  15. anonymous
    • one year ago
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    now we can find the value of c by replace the value of f(x) and x

  16. anonymous
    • one year ago
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    Oh ok thank you so much for your help do you need anything?

  17. anonymous
    • one year ago
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    you got your answer?

  18. anonymous
    • one year ago
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    Almost

  19. anonymous
    • one year ago
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    c is the y-intercept of the line

  20. anonymous
    • one year ago
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    It's given to you actually, look at x = 0 f(x) = -1

  21. anonymous
    • one year ago
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    Because: \[4(0)+c=-1\]

  22. anonymous
    • one year ago
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    ok ok

  23. anonymous
    • one year ago
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    I get it sorry I was stuck you need anything?

  24. anonymous
    • one year ago
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    Nah not really.

  25. anonymous
    • one year ago
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    Well thanks for all the help!

  26. anonymous
    • one year ago
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    You're welcome

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