Match f(x) With Its Graph

[nycmathguy]

Section 2.2
10, 12 & 14

Question 10

Graph (d).

Question 12

Graph (e).

Question 14

Graph (f).

You say?

 

[MathLover1]

you need to match a polynomial with a graph

example:
9. y = -2x^2-5x -> match with a graph ?
10. y = 2x^3-3x+1-> match with a graph ?

 

[nycmathguy]

you need to match a polynomial with a graph

example:
9. y = -2x^2-5x -> match with a graph ?
10. y = 2x^3-3x+1-> match with a graph ?

I did match 10, 12, and 14 with a graph.

Question 10 matches with graph (d).

Question 12 matches with graph (e).

Question 14 matches with graph (f).

 

[MathLover1]

Question 10

Graph (d).=> correct

Question 12

Graph (e).=> correct


14. f(x)= (1/5)x^5-2x^3+(9/5)x
matches graph b)

 

[nycmathguy]

Question 10

Graph (d).=> correct

Question 12

Graph (e).=> correct


14. f(x)= (1/5)x^5-2x^3+(9/5)x
matches graph b)

Note: 2/3 is not too bad. I thought for sure that the graph of (f) was the perfect match for 14: falls on the left and rises on the right. I will work out 9, 11, and 13 before midnight.

 

[nycmathguy]

Question 10

Graph (d).=> correct

Question 12

Graph (e).=> correct


14. f(x)= (1/5)x^5-2x^3+(9/5)x
matches graph b)

For 9, I can see that it is an inverted parabola. It matches with graph (c).

For 11, f(x) matches with graph (a).

Naturally for 13, f(x) matches with graph (f).

This is it for today. I will go through this section very slowly. I just want to grasp it a little better.

 

[MathLover1]

correct