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anonymous

  • 5 years ago

What is the axis of symmetry and the x and y intercept of f(x)=x^2-4x

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  1. amistre64
    • 5 years ago
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    y int = 0 becasue there is no constant on the end of your equation

  2. amistre64
    • 5 years ago
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    x(x-4) = = gets your x ints x = 0 and x = 4

  3. amistre64
    • 5 years ago
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    the axis of symmetry is where your vertex is; at -b/2a 4/2(1) = 2 x = 2 is your axis of symmetry

  4. anonymous
    • 5 years ago
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    ok, so whenever there is no constant the y intercept is always 0

  5. amistre64
    • 5 years ago
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    you could have also just wnet half way between the xints :)

  6. amistre64
    • 5 years ago
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    that last number tells you where it crosses the y axis; if there is no number that just means that it is actually a +0 that they decide not to write... x^2 -4x = x^2 -4x +0 right?

  7. anonymous
    • 5 years ago
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    right! I have the vertex as 2,-4 is that correct?

  8. amistre64
    • 5 years ago
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    when you plug in the x=2, you get the answer for the "y" part, so yes :)

  9. anonymous
    • 5 years ago
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    Ugh!! Thanks! I am going crazy here with this math class!!

  10. amistre64
    • 5 years ago
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    i was bored to tears in college algebra..... and in trig..... and probably will be this summer in stats and calculus1

  11. anonymous
    • 5 years ago
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    I usually do well in math but I am taking on line classes so not having the teacher there to explain things is what is making it difficult!

  12. amistre64
    • 5 years ago
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    stats should be ok....i aint to brushed up on it :)

  13. anonymous
    • 5 years ago
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    I got a D in statistics!

  14. amistre64
    • 5 years ago
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    ..... well...... if you did your best, then that is a mighty fine D :)

  15. anonymous
    • 5 years ago
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    I think it was the teacher, he was all over the place! I am a nurse and always was very good in math.

  16. amistre64
    • 5 years ago
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    rn lpn..?? my mother was a lpn and she loved it, grandma and aunt and family are nurses

  17. anonymous
    • 5 years ago
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    I have been an LPN for 12 years and i love it but i am going back to school to be a teacher

  18. amistre64
    • 5 years ago
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    after 20 years of the workplace, I decided to go back to school as well; getting me a bachelors in business and a masters in math....end goal is to be a college math teacher...

  19. anonymous
    • 5 years ago
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    oh wow, good for you! I am leaving nursing for my kids, I love being able to spend time with them, they are 6 and 11 and growing so fast!

  20. amistre64
    • 5 years ago
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    yeah, mine are 13 and 15 now :)

  21. anonymous
    • 5 years ago
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    They grow up too fast!!

  22. amistre64
    • 5 years ago
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    :) and too loud lol

  23. anonymous
    • 5 years ago
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    oh yeah! My 11 yr old has quite the little attitude as well!

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