Pls answer and explain

D is the answer

Step-by-step explanation:

for function a

Domain {0, 1, 2, 3, 4}

Range {-4, -1, 2, 5, 8}

So the Domain is alreal numbers

for function B

y=7 is a straight line with zero slope and y-intercept 7 as shown below. Hence its domain (all allowed x-values) is all real numbers, and its range (all allowed y-values) is only 7

So both function A and B have all real numbers as their Domain

what do you need me to answer?

step-by-step explanation:

x = 23.78

step-by-step explanation: