Let $f ( x , y , z ) = 48.4 - 3.1 x + 7.7 y + 8.5 z$ .
By what value is $f$ increased if $y$ is increased by 1

A)48.4
B) 8.7
C) 56.1
D) $1$
E) 7.7

Name: Let $f ( x , y , z ) = 48.4 - 3.1 x + 7.7 y + 8.5 z$ . By what value is $f$ increased if $y$ is increased by 1 A)48.4 B) 8.7 C) 56.1 D) $1$ E) 7.7
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Question

Let $f ( x , y , z ) = 48.4 - 3.1 x + 7.7 y + 8.5 z$ .  
By what value is $f$ increased if $y$ is increased by 1 
 
A)48.4
B) 8.7
C) 56.1
D) $1$
E) 7.7

Quizplus · Accepted Answer

The value of $f$ is increased by the coefficient of $y$ when $y$ is increased by 1, which is 7.7.

Let f(x,y,z)=48.4−3.1x+7.7y+8.5zf ( x , y , z ) = 48.4 - 3.1 x + 7.7 y + 8.5 zf(x,y,z)=48.4−3.1x+7.7y+8.5z

Let $f ( x , y , z ) = 48.4 - 3.1 x + 7.7 y + 8.5 z$