Help for finals for brainlist

Polygon mnopq is dilated by a scale factor of 0.8 with the origin as the center of dilation, resulting in the image m′n′o′p′q′. the coordinates of point m are (2, 4), and the coordinates of point n are (3, 5). the slope of is .

Which of the following is true for the relation f(x)=2x^2+1

A50% increase followed by 33 1/2% decrease