Here is 1 in. of water in a pool. The water level is increasing at 0.75 in/min . Which linear equation represents the total depth of the water, in inches, after x minutes?

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 : )