Understanding Domain of Functions

What is the domain of a function?

• The set of all negative numbers

• The set of all positive numbers

• The set of all possible input values

• The set of all possible output values

Why is it important to avoid division by zero in rational functions?

• It makes the function linear

• It makes the function continuous

• It makes the function undefined

• It makes the function quadratic

How do you find the domain of a rational function?

• By setting the numerator equal to zero

• By setting the denominator equal to zero

• By setting the entire function equal to zero

• By setting the function greater than zero

What values are excluded from the domain of the function 2x + 1?

• x = 1

• x = -1/2

• x = 0

• x = 2

What are the excluded values for the domain of the function x^2 - 2x - 3?

• x = 1 and x = -2

• x = 3 and x = -1

• x = 0 and x = 1

• x = 2 and x = -3