College of Admission Tests Multan

Graphing Functions

Solve the question of and select the option from the choices A through D/E. Check your Answer and view the explanation.

Question: 9

Give the equation of the parabola y = 2 x 2 + 3 x + 1 reflected over the x-axis.
  • y = 2 x 2 3 x 1
  • y = 2 x 2 + 3 x + 1
  • y = 2 x 2 3 x + 1
  • y = 2 x 2 3 x 1
  • y = 2 x 2 + 3 x 1

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Correct Answer: D

Flipping this equation over the x-axis means that the sign of y changes.

The easiest way to accomplish this is just to multiply everything by -1.

y = 2 x 2 + 3 x + 1 y = 2 x 2 3 x 1