Sept. 27/28: Reflection (a<0): 4_graphing_y_ax^2_reflection.pdf. if a is negative, the parabola is reflected about the x-axis! It opens downwards. Vertical Translation: parameter q: Notes If q is positive, move up q units. if q is negative, move down q units. Memory Trick: q for Quince, the frog, hops up and down. Quiz next class!