Which of the following best describes a line

Write the point-slope form of the line passing through (2, -12) and parallel to y=3x.

What is the value of m in the equation 1/2 m - 3/4n=16 when n=8

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 : )