Question

Which of the following equations represent linear functions?

y=4(2x)−3

x2+y=1

y=2x√

y=−2

Answer 1

• y = 4(2x) − 3
• y = −2

Explanation:

Given functions:

1. y = 4(2x) − 3
2. x² + y = 1
3. y = 2√ x
4. y = −2

Linear functions have the form of

• ax + by + c = 0 or y = mx + b

Therefore functions 1. and 4. are linear functions, the other two aren't