Determine the Domain and the Range of the Function $$f ( x ) = x ^ { 2 } + 8 x + 7$$

question 4

Multiple Choice

Determine the domain and the range of the function.
- $$f ( x ) = x ^ { 2 } + 8 x + 7$$

• A) domain: range: \(\{ x \mid x \geq 4 \}\)
• range: \(\{ \mathrm { y } \mid \mathrm { y } \geq 9 \}\)
• B) domain: range: \(\{ x \mid x \geq 4 \}\)
• range: \(\{ y \mid y \geq - 9 \}\)
• C) domain: all real numbers
• range: \(\{ y \mid y \geq - 9 \}\)
• D) domain: all real numbers
• range: \(\{ y \mid y \geq 9 \}\)

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Definitions:

Neurogenesis

The process of generating new neurons in the brain.

Central Nervous System

The part of the nervous system consisting of the brain and spinal cord.

Stem Cells

Undifferentiated cells capable of giving rise to indefinitely more cells of the same type, and from which certain other kinds of cell arise by differentiation.

Myelin Sheath

A protective covering that surrounds axons of some neurons, which helps increase the speed at which nerve impulses travel.