Question

Which of the graphs below represent the function f(x) = x3 - 5x2 + 2x + 8? You may sketch the graph to compare.

A. https://lss.brainhoney.com/Resource/22181721,AB7,0,B,0,0/Assets/71931_53b5a71a/04_04_09a.jpg
B. https://lss.brainhoney.com/Resource/22181721,AB7,0,B,0,0/Assets/71931_53b5a71a/04_04_09b.jpg
C. https://lss.brainhoney.com/Resource/22181721,AB7,0,B,0,0/Assets/71931_53b5a71a/04_04_09c.jpg
D. https://lss.brainhoney.com/Resource/22181721,AB7,0,B,0,0/Assets/71931_53b5a71a/04_04_09d.jpg

Answer 1

f(x) = x^3 - 5x^2 + 2x + 8

Answer 2

@dtan5457 Can you help with this one?

Answer 3

just go the easy way and make a table then create random x values and substitute them on the equation to get the y values and then pace them on the graph

Answer 4

and then you'll get B as your answer :)

Answer 5

Thank you!!! :)

Answer 6

no problem :) thank you for the medal :)

Answer 7

Here is a good site to check your work. Here is the graph
http://www.wolframalpha.com/input/?i=f%28x%29+%3D+x%5E3+-+5x%5E2+%2B+2x+%2B+8

Answer 8

As you can see B passes through the roots of the equation, which are -1, 2 and 4