Difficult Parabola Question for the SAT Today I have decided to give you a difficult SAT math question about parabolas and transformations of graphs. I will post a solution soon. In the meantime, you can post your own solutions in the comments below. Level 5 Passport to Advanced Math The vertex of the parabola in the xy-plane above is (h, k). Which of the following is true about the parabola with the equation y = –ax2 + k ? A) The parabola opens upward and the vertex is (0, k). B) The parabola opens downward and the vertex is (0, k). C) The parabola opens upward and the vertex is (0, –k). D) The parabola opens downward and the vertex is (0, –k). Share this problem with your Facebook friends that are preparing for the SAT If you’re preparing for the SAT, you may want to check out the Get 800 collection of SAT math books. Comments comments