Practice idea of functions MCQs in math quiz for test prep. Functions and graphs quiz questions has multiple choice questions (MCQ) with idea of functions test, answers as by putting value for x as -4 in function y = 5x, answer will be, answer key with choices as 1, −20, 20 and −1 for competitive exam preparation worksheets. Free math revision notes to learn idea of functions quiz with MCQs to find questions answers based online tests.

MCQ. By putting value for x as -4 in function y = 5x, answer will be

1. 1
2. −20
3. 20
4. −1

B

MCQ. If monthly pay of salesman is 'y' and includes basic pay \$200 plus a commission of \$5 for every unit he sales then function for this can be written as

1. x = 205 + 5y
2. 200 + 5xy
3. y = 200 + 5x
4. y = 205 + x

C

MCQ. By putting value for x as 3 in function y = 10x, answer will be

1. 3.334
2. 7
3. 30
4. 13

C

MCQ. Consider function y = 10 - 4x, if value of x = -1 then value of 'y' is

1. 6
2. −2
3. 14
4. 2

C

MCQ. If each ticket of amusement park is sold for \$20 then function for total sales can be written as

1. y = 20 + x
2. 20xy
3. x = 20y
4. y = 20x

D