The parabola equation is
and the points are
and
.
Length of the curve
on the interval
is
.
Find the length of the curve
on the interval
.
Consider
.
Differentiate on each side with respect to
.

Use the power rule property of derivative:
.

.
The formula for arc length is 
Substitute
in above formula.

Use the property :
.


The length of the arc is
units.
The length of the arc is
units.