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shelby1290

  • one year ago

Evaluate f(3) for each of the following: a) {(1,2), (2,0), (3,1), (4,2)} b) {(1,2), (2,3), (3,4), (4,5)} c) {(1,3), (2,5), (3,2), (4,0)}

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  1. Nnesha
    • one year ago
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    evaluate what ?

  2. shelby1290
    • one year ago
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    @Nnesha I'm supposed to get an answer. At the back of my textbook the answers are: a) 1 b)4 c) 2

  3. shelby1290
    • one year ago
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    I just don't understand how they came to be and I must show my work.

  4. Bee_see
    • one year ago
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    here, look at the x values that are 3. The Y values are 1,4, and 2

  5. shelby1290
    • one year ago
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    ohhhhhhhhhhhhh I see. That makes sense!

  6. Bee_see
    • one year ago
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    You normally have f(x),right? In this case, they replaced the x with 3. x=3.

  7. shelby1290
    • one year ago
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    @Bee_see Mhm i get it. Wow that was pretty simple. Do you have time for another one? It's still related to notations but a bit more complicated....

  8. Bee_see
    • one year ago
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    OK. Let's see it.

  9. shelby1290
    • one year ago
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    Determine f(-2), f(0), f(2) and f(2x) for each function. a) f(x) = -3x^2 + 5 b) f(x) = 4x^2 -2x + 1

  10. shelby1290
    • one year ago
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    Do i just plug them in for x

  11. Bee_see
    • one year ago
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    Yes!

  12. Bee_see
    • one year ago
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    |dw:1442287125606:dw|

  13. shelby1290
    • one year ago
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    |dw:1442287326562:dw|

  14. shelby1290
    • one year ago
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    Like that? ^

  15. Bee_see
    • one year ago
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    everything is right except for the last one. It's f(2x), right?

  16. shelby1290
    • one year ago
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    yes...

  17. shelby1290
    • one year ago
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    Is it -7x instead?

  18. Bee_see
    • one year ago
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    |dw:1442287483547:dw|

  19. Bee_see
    • one year ago
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    do you understand? When you are multiplying variables with exponents, you are going to add them so...(2)(2)=4 and (x)(x)= x^1+1=x^2

  20. shelby1290
    • one year ago
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    Oh okay and yes, i understand that

  21. Bee_see
    • one year ago
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    great. can you do part b? I can check the answers if you want me to.

  22. shelby1290
    • one year ago
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    the same thing goes for part b as well, right?

  23. Bee_see
    • one year ago
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    right

  24. shelby1290
    • one year ago
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    alright sounds good

  25. shelby1290
    • one year ago
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  26. shelby1290
    • one year ago
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    @Bee_see My wifi started to lag so I took a screenshot of the draw section thing lol

  27. shelby1290
    • one year ago
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    Am I correct though?

  28. Bee_see
    • one year ago
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    yes. everything

  29. shelby1290
    • one year ago
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    haha that's great! thanks for the help :)

  30. Bee_see
    • one year ago
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    no problem

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