Answer: 1. [tex]C=2\pi r[/tex]
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 :
[tex]1.\ \ C=2\pi r[/tex]
Here , variable = r (radius)
Since , the variable has exponent =1 , therefore it is a linear equation.
[tex]2. A=\pi r^2[/tex]
Here , variable = r (radius)
Since , the variable has exponent =2 , therefore it is not a linear equation.
[tex]2. V=\dfrac{4}{3}\pi r^3[/tex]
Here , variable = r (radius)
Since , the variable has exponent =3 , therefore it is not a linear equation.
Hence , the correct answer is [tex]C=2\pi r[/tex].
