find domain when range is given / finding range when domain

[TRINA]

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]

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