Choose which of the following functions has a domain of all real numbers. Select all that apply.

a.) y = x

b.) y = 2x2 + x - 3

c.) y = 3x - 4

d.) y = 2

e.) y = 3 - x2

Question

Kieran Keller

Mathematics

1 May, 12:06

Choose which of the following functions has a domain of all real numbers. Select all that apply.

a.) y = x

b.) y = 2x2 + x - 3

c.) y = 3x - 4

d.) y = 2

e.) y = 3 - x2

+3

Answers (1)

Know the Answer?

Joel Stanley · Answer 1

Domain is the set of x values in which the graph of a function exists. If the domain is all real numbers; that means there are no gaps in the graph. The only time the domain is not ARN is when there is a square root, denominator, or log/ln. Anything under a square root must be positive. The denominator cannot be equal to zero. A log function must be strictly positive. Therefore all of the equations listed above apply.

Choose which of the following functions has a domain of all real numbers. Select all that apply.a.) y = xb.) y = 2x2 + x - 3c.) y = 3x - 4d.) y = 2e.) y = 3 - x2

Choose which of the following functions has a domain of all real numbers. Select all that apply.

a.) y = x

b.) y = 2x2 + x - 3

c.) y = 3x - 4

d.) y = 2

e.) y = 3 - x2