find domain when range is given / finding range when domain

TRINA

New member
Joined
Sep 24, 2006
Messages
1
FIND THE DOMAIN, WHEN RANGE IS {3, 10 }
1. y=3x+4
FIND THE RANGE, WHEN THE DOMAIN IS {-4, -1, 11}
3. y=3/5x-5
 

skeeter

Senior Member
Joined
Dec 15, 2005
Messages
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FIND THE DOMAIN, WHEN RANGE IS {3, 10 }
1. y=3x+4
set y = 3 ... solve for x
set y = 10 ... solve for x

domain will be the set of two x-values you get.

FIND THE RANGE, WHEN THE DOMAIN IS {-4, -1, 11}
3. y=3/5x-5
substitute -4 for x ... evaluate y
substitute -1 for x ... evaluate y
substitute 11 for x ... evaluate y

the range will be the set of three y-values you get
 
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