# algebra

posted by .

Can someone please explain

What polynomial has a graph that passes through the given points?

(–4, 89), (–3, 7), (–1, –1), (1, –1), (4, 329)

y = 2x3 – 3x2 – 2x + 1
y = 1x4 – 2x3 – 3x2 + 2x + 1
y = x4 – 2x3 + 3x2 + 2x – 1
y = x4 + 2x3 – 3x2 – 2x + 1

• algebra -

what, you can't plug in the values and evaluate?

329 is greater than 4^3, so y is obviously a 4th-degree polynomial.

4^4 = 256, so I'd try the last one:
256 + 2*64 - 3*16 - 2*4 + 1 = 329, so check the other values. Looks like the one.

• algebra -

so you think
y=x^4+2x^3-3x^2-2x+1
I don't understand these problems

• algebra -

It's not too complicated. They gave you a list of x and y values. All you have to do is plug in the x values and see whether one of the functions produces the correct y values.

The point of these exercises is just to see whether you can evaluate expressions using various values.

Looks like you need to spend some time graphing functions and evaluating expressions.

You can play around with such things at

rechneronline.de/function-graphs

Toward the bottom there's an area where you can type in a function and give it values. That's what I did once I had seen that x^4+2x^3-3x^2-2x+1 produced 329 for x=4.

The only way to get comfortable with this stuff is to play around with it for a few hours.

• algebra -

3x²-2x³=log(x² 1)-logx

## Similar Questions

1. ### Algebra-please check my work

check my answers please. Use the Intermediate Value Theorem to determine whether the polynomial function has a real zero between the given integers. f(x) = 2x3 + 10x2 - 8x - 5; between 1 and 2 -I got: f(1)=1 and f(2)=35;no Determine …
2. ### Algebra one, help me please?

Okay so, I have to write an equation in standard form, of a line that passes through the given point and has the given slope, ( M) or that passes through the given points. Heres what I think: 1)( 4,-1) M= 3 So, it's in y=3x+B and then, …
3. ### algebra

Essay; show all work. Bob’s Barber Shop estimates their gross revenue for the second quarter to be given by the polynomial 2x3 – 3x2 + 7x – 1. The shop estimates their costs for that quarter to be given by x2 + 4x + 2. For the …
4. ### algebra

I have a few questions that I don't understand hope someone can help. 1)write an equation of th line, in point slope form, that passes through the two given points. (-17,8),(3,-2) I figured (y-8)=-2(x+17) not sure 2) the graph of g(x) …
5. ### algebra

which polynomial has a graph that passes through the given points?
6. ### Algebra

1. What polynomial has a graph that passes through the given points?
7. ### ALGEBRA PLSSSSSS

What polynomial has a graph that passes through the given points?
8. ### ALGEBRA 2 (LOGARITHMIC FUNCTIONS)

These are some I chose to practice but I have a hard time knowing how to do it. The answers are online but that doesn't help. These deal with logarithmic functions etc. PLEASE HELP! THANKYOU 1.)solve the equation: 3^(x+1)=27^(x+3) …
9. ### Algebra 1 help

Can someone tell me if my answers are right and explain how you got each one thank you very much ! 1. What is the slope of the line that passes through the points (-2, 5) and (1, 4)?
10. ### polynomial

can someone use the graph of y=2x³+x²+x+8 to find d roots of y=2x³ +x²-x +5?

More Similar Questions