Given the domain {-5, 0, 5}, what is the range for the relation 2x+y=1

The domain x ∈ {-5; 0; 5}
the relation: 2x + y + =1 → y = 1 - 2x

Put the values of x from domain to the equation of the relation:
for x = -5 → y = 1 - 2(-5) = 1 + 10 = 11for x = 0 → y = 1 - 2(0) = 1 - 0 = 1for x = 5 → y = 1 - 2(5) = 1 - 10 = -9
{-9; 1; 11}

By definition, BF = 1/2 * CE;

So, BF = 1/2 * 90 = 45.

BF = 45

(Midsegment Length Theorem)