How to find the length of a Parabola

Hi there, How do I find the length of the parabola given by this equation? Equation: y = 1/20x^2 -5.

Thank you for your help.

[Ameer Hamza]

How do you define the "Length of Parabola" for this question?

Answer 1

[KSSV]

x = linspace(-10,+10,10^3) ; 
y = 1/20*x.^2 -5 ; 
dx = diff(x) ;
dy = diff(y) ; 
L = sum(sqrt(dx.^2+dy.^2) );