[MOVED] F(x) and real zeros (as shown on calculator)

[bleach_bankai]

Please help!
Draw the graph of (fx)=.05x^3+6x^2-2x-3 in the [-15, 10] by [-100, 175] window. How many real zeros are evident in this graph?

Choices are:
a)1
b)2
c)3
d)0
e)infinitely many

I have a TI-89 graphing calculator, but I have no clue what to do! Please someone help me

 

[fasteddie65]

Re: F(x) and real zeros

You are asked to "draw the graph of f(x) = .05x^3 + 6x^2 - 2x - 3 in the [-15, 10] by [-100, 175]."

I have a TI-84, but the idea is the same. Do you know how to set the window? That you should do first. I would suggest an x-scale of 5 and a y-scale of 25.

Next type in the function.

Now hit GRAPH. You should see a graph in the window. How many times does the graph appear to intersect the x-axis?

 

[bleach_bankai]

Re: F(x) and real zeros

I graphed it. It appears to go through the x-axis twice. So the answer is B?