Transcribed Image Text: Consider the function z = f(x,y). Some values for z are given in the table below. %3D y = 10 15 20
Transcribed Image Text: Consider the function z = f(x,y). Some values for z are given in the table below.
%3D
y = 10
15
20
25
30
X = 12
100
90
80
70
60
18
110
100
90
80
70
24
125
115
105
95
85
30
145
135
125
115
105
Question 2
Find an underestimate for
f dA
, where R is the rectangle
12 < x < 30
10 < y < 30
using
Дх — 6
and
Ay = 5
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