SOLUTION: Tell whether each of the following parabolas opens upward or downward. a. y = x^2 - 1 a. _________ b. y = - 3x^2 b. _________

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Tell whether each of the following parabolas opens upward or downward. a. y = x^2 - 1 a. _________ b. y = - 3x^2 b. _________      Log On


   

Question 92188This question is from textbook
: Tell whether each of the following parabolas opens upward or
downward. a. y = x^2 - 1 a. _________
b. y = - 3x^2 b. _________ This question is from textbook

Answer by scott8148(6628) About Me  (Show Source):
You can put this solution on YOUR website!
if the sign of the ^2 term is positive, the parabola opens upward; if negative, it opens downward

a. up ... b. down