[BlindMath] Average Rate of Change problem

[Bente Casile]

Elise,

 Your function is y (also known as f of x ) equals x squared minus x plus 4.  Average rate of change is calculating slope.  You have your x values given to you in the problem and you compute the y values by putting your x values in the function to get the y that goes with it.  So for example for x = 1 I find the y by solving 1 squared minus 1 plus 4 which is 4, so your point is (1,4) and for x equals 2 you have 2 squared minus 2 + 4 = 6 so your second pair is (2,6)  Now you do your average rate of change, that is change in y over change in x, so in this case (6-2) over (2-1) that becomes 4 over 1 which simplifies to 4.  Now you can do the same  from x = 2 to x = 6.

Bente
On Aug 18, 2018, at 7:54 AM, Elise Berkley via BlindMath <blindmath at nfbnet.org> wrote:

> Hello, mathematicians.
> In my precalc class, we are studying "average rate of change." I am so
> stuck and I am asking for help with this problem.
> 	Find the average rate of change of f(x) = x2 – x + 4 from x_1  = 2 to x_2=6 .
> If anyone can help me with this, I would greatly appreciate it. Thanks!
> Elise Berkley
> 
> _______________________________________________
> BlindMath mailing list
> BlindMath at nfbnet.org
> http://nfbnet.org/mailman/listinfo/blindmath_nfbnet.org
> To unsubscribe, change your list options or get your account info for BlindMath:
> http://nfbnet.org/mailman/options/blindmath_nfbnet.org/bente%40casilenc.com
> BlindMath Gems can be found at <http://www.blindscience.org/blindmath-gems-home>