Algebra and Trigonometry (MindTap Course List)
4th Edition
ISBN:9781305071742
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter2: Functions
Section2.4: Average Rate Of Change Of A Function
Problem 4.2E: bThe average rate of change of the linear function f(x)=3x+5 between any two points is ________.
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Step 1
Solution -
g(x,y) is a linear function.
let g(x,y) = ax+by+c
from graph of g(x,y).
The graph g(x,y)=-1 passes through (0,0) and (3,2)
ax+by+c=-1 passes through (0,0) and (3,2)
(0,0) and (3,2) would satisfied ax+by+c=-1
Therefore, a(0) + b(0) + c=-1
c=-1
and a(3) + b(2) + c=-1 3a+2b+c=-1
3a+2b-1=-1
3a+2b=0 ----(1)
also g(x,y)=0 passes through (2,0)
ax+by+c=0 passes through (2,0)
Therefore, a(2)+b(0)+c=0
2a+c=0
2a-1=0
Cl=1/2
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