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: Linear and other Functions Practice MCQ

Question Statement:

Which of the following expressions is not a function?

y = \pm \sqrt{x^{2} - 7 x + 5}

y = 2^{x} + 343

y = 5 x + 99

y = s i n x

y = 6 x^{2} - 54 x + 76

Explanation:

Correct Answer: A

Recall that an expression is only a function if it passes the vertical line test. Test this by graphing each function and looking for one which fails the vertical line test. (The vertical line test consists of drawing a vertical line through the graph of an expression. If the vertical line crosses the graph of the expression more than once, the expression is not a function.)

Functions can only have one y value for every x value. The only choice that reflects this is:

$y = \pm \sqrt{x^{2} - 7 x + 5}$

Question: 10 Test: 3 of 4 Next Test

Tests

You are taking Aptitude Test No. 3

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 10 and Test Number 3 of Functions: Linear and other 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 of the following expressions is not a function? .... with options: $y = \pm \sqrt{x^{2} - 7 x + 5}$ , $y = 2^{x} + 343$ , $y = 5 x + 99$ , $y = s i n x$ can be solved with the concepts and understanding of Functions.