Power Functions and Polynomials

• Polynomial in standard form

• Not Polynomial

• Cannot be determined

• Polynomial but not in standard form

• Polynomial in standard form

• Not Polynomial

• Cannot be determined

• Polynomial not in standard form

• Polynomial in standard form

• Not Polynomial

• Cannot be determined

• Polynomial not in standard form

• Polynomial in standard form

• Not Polynomial

• Cannot be determined

• Polynomial not in standard form

• Polynomial in standard form

• Not Polynomial

• Cannot be determined

• Polynomial not in standard form

• 9

• 5

• 4

• 10

• 9

• 5

• 4

• 10

• 4

• -17

• 12

• 11

The surface area S of a sphere varies directly as the square of the radius. Which power function best models this situation?

• S = r²

• S = kr

• S = kr²

• S² = r

The force of gravity F acting on an object is inversely proportional to the square of the distance d from the object to the center of the earth. Which power function best models this situation?

• F = kd²

• F = k²d

• F = k/d

• F = k/(d²)