Chapter 16.2, Problem 28E

Use a graph of the vector field F and the curve C to guess whether the line integral of F over C is positive, negative or zero. Then evaluate the line integral.

$F\left(x,y\right)=\frac{x}{\sqrt{x^2+y^2}}i+\frac{y}{\sqrt{x^2+y^2}}j,$

C is the parabola $y=1+x^2$ from $\left(-1,2\right)$ to $\left(1,2\right)$