For every hour that noah stufies, his test score goes up 3 points. explain which is the independent variable and which is the dependent variable. write an equation modeling he relationship between hours studied h and the increase in noahs test scores s.

solve systems of equations by graphing. a system of linear equations contains two or more equations e.g. y=0.5x+2 and y=x-2. the solution of such a system is the ordered pair that is a solution to both equations. to solve a system of linear equations graphically we graph both equations in the same coordinate system