Question

Which of the equations listed below are linear equations?

Answer 1

A is correct answer....

Answer 2

Answer: 1. $C=2\pi r$

Step-by-step explanation:

We know that a linear equation is a particular type of equation .

• It is an algebraic equation in which each term has an exponent of one.
• Its graph is a a straight line.

The given equations :

$1.\ \ C=2\pi r$

Here , variable = r (radius)

Since , the variable has exponent =1 , therefore it is a linear equation.

$2. A=\pi r^2$

Here , variable = r (radius)

Since , the variable has exponent =2 , therefore it is not a linear equation.

$2. V=\dfrac{4}{3}\pi r^3$

Here , variable = r (radius)

Since , the variable has exponent =3 , therefore it is not a linear equation.

Hence , the correct answer is $C=2\pi r$.