Question

Y=-4-x; domain = {-6, 2,7}

Answer 1

We have to put values of domain to find range

`\\ \ast\sf\longmapsto y=-4-x`

`\\ \ast\sf\longmapsto D_R=[-6,2,7]`

`\\ \ast\sf\longmapsto y=-4-(-6)=-4+6=2`

`\\ \ast\sf\longmapsto y=-4-2=-6`

`\\ \ast\sf\longmapsto y=-4-7=-11`

Now

`\\ \ast\sf\longmapsto R_R=[2,-6,-11]`