In a science fiction movie, a crack in the ground is to expand across a field, while Rhena, an actress,
races to cross the field before it is cut in half by the crack. Let t = 0 correspond to the time the crack
begins to expand and suppose it expands according to the parametric equations x(t) = 6t and y(t) = 2
2t, where t is measured in seconds and distance is measured in feet. Rhena's path is given by x(t) = 2-
4.5t and y(t) = 15+ 3t.
Write a linear equations in terms of x and y that model the path of the crack.