B. Directions: Identify which equation is written in standard form or in slope-intercept form. Write SF if it is in standard form and SI if it is in slope-intercept form. Rewrite all the standard form into slope-intercept form and vice versa. Write your answer on a separate sheet of paper. SI or SF NEW EQUATION 1. 2x + y = 9 2. y=2x-5 y=-3x + 7 3x - y = 2 5x+2y=7