Directions How to Answer

Aptitude Test Topic: Functions

Functions include Linear functions and Graphical functions.

Directions

Solve the given question and choose the best answer from the given choices.

To give the answer click/tap the option alphabet for your answer choice. for correct answer green check and for wrong answer a red cross will appear along with a button to show explanation with or without video of the question answer.

Functions: Graphing Functions Practice MCQ

Question Statement:

Which would be the equation of $y = 2 (x + 1)^{2} - 4$ when reflected over the y-axis?

y = 2 (x + 1)^{2} + 4

y = 2 (x - 1)^{2} - 4

y = - 2 (x - 1)^{2} + 4

y = - 2 (x + 1)^{2} + 4

y = - 2 (x + 1)^{2} - 4

Explanation:

Correct Answer: B

To flip this over the y-axis, the sign of x changes.

This entails changing $(x + 1)^{2}$ to $(- x + 1)^{2}$

$(- x + 1)^{2} = (- (- x + 1))^{2} = (x - 1)^{2}$

Perhaps a simpler way to think about this is that the vertex for this parabola is at (−1,4).

If we flip the equation over the y-axis, it will place the vertex at (1,4), making our new equation $y = 2 (x - 1)^{2} + 4$

Question: 9 Test: 1 of 2 Next Test

Tests

You are taking Aptitude Test No. 1

Each aptitude test is comprised of 10 except the last test which might have fewer than 10 in some topics.

You are at question (MCQ) number 9 and Test Number 1 of Functions: Graphing Functions. To deal with Functions questions, you must take lesson on the subject. In case of science and Art subjects revise your text books and in case of general aptitude topics take lessons from the topic page.

The question: Which would be the equation of $y = 2 (x + 1)^{2} + 4$ , $y = 2 (x - 1)^{2} - 4$ , $y = - 2 (x - 1)^{2} + 4$ , $y = - 2 (x + 1)^{2} + 4$ can be solved with the concepts and understanding of Functions.