how much dyu know about any of them? differentiation... y = 3x² + 2x + 6 thats the equation of the line. times the power by the number in front (3,3,6) dy/dx = 6x + 2 thats it differentiated. the x disapears on the 2nd one because it becomes x to the power of 0. this is also the gradient of the line. integration.... basically the reverse of this, its impossible to tell what the third one is (if there is one) so leave a '+c' at the end. i think