Wednesday

November 26, 2014

November 26, 2014

Posted by **lee** on Wednesday, November 14, 2012 at 11:44am.

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 -
**Steve**, Wednesday, November 14, 2012 at 11:57amwhat, 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 -
**lee**, Wednesday, November 14, 2012 at 12:58pmso you think

y=x^4+2x^3-3x^2-2x+1

I dont understand these problems

- algebra -
**Steve**, Wednesday, November 14, 2012 at 1:51pmIt'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.

**Answer this Question**

**Related Questions**

algebra - which polynomial has a graph that passes through the given points? (-3...

Algebra one, help me please? - Okay so, I have to write an equation in standard ...

algebra - I have a few questions that I don't understand hope someone can help. ...

Algebra-please check my work - check my answers please. Use the Intermediate ...

algebra - write an equation of the line in point slope form that passes through ...

math - find the exponential function of the form y=ab^x whose graph passes ...

math - i have more than one question so if u no any of the answers please tell ...

algebra - Write an equation in slope-intercept form of the line that passes ...

pre calc - Find an equation of the cubic polynomial f(x) = ax3 + bx2 + cx + d ...

Algebra 1 - Write an equation in standard form of the line that passes through ...