Describe Transformation Effects Using Coordinates Practice Test

Triangle $JKL$ has vertices $J(2,-1)$, $K(4,-1)$, and $L(3,2)$. It is dilated by a scale factor of $2$ centered at the origin. What are the coordinates of $L'$?

A triangle has vertices $A(-1,0)$, $B(2,1)$, and $C(1,-3)$. It is reflected over the line $y=x$. What are the coordinates of $B'$?