How can i find the slope and y-intercept ? do i have to use some specific calculator?

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 .

If you could answer these your a life saver

Triangle knm is what is true about the sides of knm