HELP ME PLEASE Which of these might tell you that a table is quadratic? (Choose all that apply)

-Common 2nd difference

-Repeats itself

-Has a minimum or maximum

-Adding the same number

-Multiplying by the same number

PLS HELP ME OUT IVE BEEN STUCK ON THIS FOR DAYS ILL GIVE YOU POINTS OR WHATEVER I PROMISE

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.