Answer:
6
Step-by-step explanation:
f(x) = √2x-4
f(20) = √2(20)-4
f(20) = √40-4
f(20) = √36
f(20) = 6
perp. -5
y + 7 = -5(x - 4)
y + 7 = -5x + 20
y = -5x + 13
{(–1, 1), (–2, 1), (–2, 2), (0, 2)}
In a function, each input has an output
Each domain has a range. In a function, range can be repeated but domain cannot be repeated. Same domain cannot have two range values.
Here domain is {-1, -2, -2, 0}
Range is { 1, 1, 2, 2}
Domain -2 is repeating so this relation is not a function
Answer : No; a domain value has two range values.
