Solve. Assume the exercise describes a linear relationship. When writing a linear equation, write the equation in slope-intercept form. The average value of a certain type of automobile was $13,980 in 1992 and depreciated to $8100 in 1996. Let y be the average value of the automobile in the year x, where x = 0 represents 1992. Write a linear equation that models the value of the automobile in terms of the year x. Oy-1470x + 13,980 y=-1470x + 8100 y- 1920x 1470X-8100 y=-1470x + 2220