Question

Y = -2x +5; domain = {-2, 2, 4}
Please help me find the range values thanks

Answer 1

We have to put values of domain to find range

`\\ \ast\sf\longmapsto y=-2x+5`

`\\ \ast\sf\longmapsto D_R=[-2,2,4]`

`\\ \ast\sf\longmapsto y=-2(-2)+5=4+5=9`

`\\ \ast\sf\longmapsto y=-2(2)+5=-4+5=1`

`\\ \ast\sf\longmapsto y=-2(4)+5=-8+5=-3`

Now

`\\ \ast\sf\longmapsto R_R=[9,1,-3]`