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 of the following is the function graphed below?

y = \frac{1}{2} x + 5

y = - 2 x - 5

y = \frac{1}{2} x - 5

y = 2 x - 5

y = 2 x + 5

Explanation:

Correct Answer: D

This function is linear (a line), so we must remember that we can represent lines algebraically using y=mx+b, where m is the slope and b is the y-intercept.

Looking at the graph, we can tell immediately that the y-intercept is -5, because the line crosses(intercepts) the y-axis at -5.

To find the slope, we need two points, (x₁, y₁), (x₂, y₂) and the following formula:

$m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}$

For the sake of the example, choose (0,-5) and (2,-1). We can see that the graph clearly passes through each of these points. Any two points will do, however. Substituting each of the values into the slope formula yields m=2.

Thus, our final answer is $y = 2 x - 5$

Question: 1 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 1 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 of the following is the function graphed below?

Biology

Chemistry

Computer Science and IT