The first equation of a system of linear equations has a slope of 1 and a y-intercept of -9. The second equation has a slope of -7 and passes through the point (1, -2). Write the system of linear equations. A. y = -9x + 1 y = 5x - 7 B. y = x - 9 y = 5x - 7 C.y = -9x + 1 y = -7x + 5 D. y = x - 9 y = -7x + 5