Which choice(s) when rounded to the nearest hundred thousand will result in 600,000

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 .

Find the cosine function that is represented in the graph.

25 ! i need asap! ! ill mark brainliest!