Evaluating functions, Mathematics

Assignment Help:

Next we have to talk about evaluating functions.  Evaluating a function is in fact nothing more than asking what its value is for particular values of x. Another way of looking at it is that we are asking what the y value is for a given x is.

Evaluation is actually quite simple.  Let's consider the function we were looking at above

                                                 f( x ) = x2 - 5x + 3

and ask what its value is for x= 4 .  In terms of function notation we will "ask" this using the notation f( 4) .  Thus, while there is something other than the variable within the parenthesis we are actually asking what the value of the function is for that specific quantity.

Now, while we say the value of the function we are actually asking what the value of the equation is for that specific value of x.  Here is f( 4) .

                     f ( 4)= ( 4)2  - 5 ( 4) + 3 = 16 - 20 +3 = -1

Notice that evaluating a function is done in exactly the same way in which we evaluate equations. We plug in for x whatever is on the inside of the parenthesis on the left. Following is another evaluation for this function.

                              f( -6) = ( -6)2  - 5 ( -6) + 3 = 36 + 30 + 3 =69

Thus, again, whatever is on the inside of the parenthesis on the left is plugged in for x in the equation on the right.


Related Discussions:- Evaluating functions

Geometry help, A painter leans a 10-foot ladder against the house she is to...

A painter leans a 10-foot ladder against the house she is to paint. The foot of the ladder is 3 feet from the house. How far above the ground does the ladder touch the house? Appro

Solve 9 sin ( 2 x )= -5 cos(2x ) on[-10, Solve 9 sin ( 2 x )= -5 cos(2x ) o...

Solve 9 sin ( 2 x )= -5 cos(2x ) on[-10,0]. Solution At first glance this problem appears to be at odds with the sentence preceding the example. However, it really isn't.

Solve following 4e1+3 x - 9e5-2 x = 0 logarithms, Solve following 4e 1+3 x...

Solve following 4e 1+3 x - 9e 5-2 x  = 0 . Solution Here the first step is to get one exponential on every side & then we'll divide both sides by one of them (that doesn'

Application of linear function, four times an unknown number is equal to tw...

four times an unknown number is equal to twice the sum of five and that unknown number

Outer automorphism, (a) An unordered pair fm; ng with 1 ≤ m ≠ n ≤ 6 is ca...

(a) An unordered pair fm; ng with 1 ≤ m ≠ n ≤ 6 is called a duad. List the 15 duads. (b) There are 15 ways to partition {1, ......, 6 } into 3 duads, such as { {1; 2}, {3, 4},

Upward lline stretch, what is Baker College Online upward line stretch?

what is Baker College Online upward line stretch?

Compute simple addition, John was doing his homework on vertical addition, ...

John was doing his homework on vertical addition, and had to compute : 5 3+ 3 4  and 6 8 +45 He did the first one easily, just the way his teacher had taught him. He first ad

What are the three sides of a right triangle, What are the Three Sides of a...

What are the Three Sides of a Right Triangle? Each side of a right triangle can be labeled opposite, adjacent, or hypotenuse, based on its relationship to the right angle and o

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd