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

Find the number of ways to arrange words, Q. Find the number of ways three ...

Q. Find the number of ways three letter "words" can be chosen from the alphabet if none of the letters can be repeated? Solution:  There are 26 ways of choosing the first lett

Determine the domain and range of function, Determine the domain of each of...

Determine the domain of each of the following functions.                         f( x ) = x - 4 / x 2 - 2 x -15 Solution With this problem we have to avoid division by

the comic book, a) The first comic book is of shakitman was sold in 1938. ...

a) The first comic book is of shakitman was sold in 1938. In 2010, the estimated price for this comic book in good condition was about $500,000. This represented a return of 25 per

Substitution rule for definite integrals, Substitution Rule for Definite In...

Substitution Rule for Definite Integrals Now we need to go back and revisit the substitution rule as it also applies to definite integrals.  At some level there actually isn't

Statisctics, I would like to know what a symbol in my homework means?

I would like to know what a symbol in my homework means?

Sample space, Sample Space is the totality of all possible out...

Sample Space is the totality of all possible outcomes of an experiment. Hence if the experiment was inspecting a light bulb, the only possible outcomes

Student, What is the slope and y intercept for (6,5) (-3,8)

What is the slope and y intercept for (6,5) (-3,8)

What is converse- inverse and contrapositive, What is Converse, Inverse, an...

What is Converse, Inverse, and Contrapositive In geometry, many declarations are written in conditional form "If ...., then....." For Example: "If two angles are right angles,

LASPEYRES AND PAASCHE, advantages and disadvantages of laspeyres and paasch...

advantages and disadvantages of laspeyres and paasche

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