so domain is the number you can use range is the output your get from inputting the domain given so from 2≤x≤5 since it is linear, we can be sure that we only need to test the endpoints of the domain to find the endpoints of the range
sub 2 for x y=2(2)+1 y=4+1 y=5
sub 5 for x y=2(5)+1 y=10+1 y=11
so range is from 5 to 11 in interval notation: [5,11] in other notation 5≤y≤11 or R={y|5≤y≤11}
