Match the differential equation with its direction field. y ′ = 8 − y Give reasons for your answer. y ′ = 8 − y = 0  on the line  y = −x +  1 8,  and  y ′ = −1  on the line  y = −x. The slopes at each point are independent of x, so the slopes are the same along each line parallel to the x-axis. Note that for  y = 8,

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter1: Equations And Graphs
Section1.3: Lines
Problem 92E
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Match the differential equation with its direction field.
y ′ = 8 − y
Give reasons for your answer.
y ′ = 8 − y = 0
 on the line 
y = −x + 
1
8
,
 and 
y ′ = −1
 on the line 
y = −x.
The slopes at each point are independent of x, so the slopes are the same along each line parallel to the x-axis. Note that for 
y = 8,
 
y ′ = 0.
    
y ′ = 8 − y = 0
 on the lines 
x = 0
 and 
y = 0,
 and 
y ′ > 0
 for 
0 < x < 
?
8
,
 
0 < y < 
?
8
.
The slopes at each point are independent of y, so the slopes are the same along each line parallel to the y-axis. Note that for 
y = 8,
 
y ′ = 0.
y ′ = 8 − y = 0
 on the lines 
x = 0
 and 
y = 8.
 
choose one pls 
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