A group of students went on a hike and measured the change in elevation over the length of the trail. They plotted these data on the graph shown below. They wanted a shorthand way to describe the line that represents the trail. Which slope-intercept equation describes the line? y - intercept = (0,2) slope = -1 A. y = -x + 2 B. y = x - 2 C. y = x + 2 D. y = -x - 2