classify the linear equations by writing SF if the equation is in standard form and SIF if it is in slope- intercept form.Write your answer on a separate sheet of paper. ____1.2x + y =6 ____2.y = 5x -1 ____3.y =3/4x + 2 ____4.x - 3y = -5 ____5.y = -2x +4 ____6. 4x -7y=9 in separate sheet of paper answer the following questions: —how did you classify linear equations in two variables? —explain the difference of standard form of equation from slope-intercept form.