Graph △DEF with vertices D(1,1),E(3,−1), and F(1,−3) and its image after a dilation centered at the origin with a scale factor of 4.

Choose the more precise measurement. 26.4 cm or 8.39 cm

This is a map of the mars exploration rover opportunity predicted landing site on mars. the scale is 1cm : 9.4km. what are the approximate measures of the actual length and width of the ellipse? i mostly need to know how to set it up : )

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1