Note: From our original quadratic equation, a=2, b= -8, and c=3
Note: Since a is a positive number, we know that the parabola will be positive.
Calculate h: h= -b/2a = -(-8)/(2 • 2) = 2
Calculate k (with the above information): f(2) = 2(2)2 - 8•2 + 3 = 8-16+3 = -5
The vertex is (2, -5) with an axis of x=2
Find the x- and y-intercepts. Remember, the quadratic formula will help you find the x-intercepts
Want to get more subject review content and quizzes?
Keep coming back to the TASC test blog or follow us on Facebook to get more test preperation materials, quizzes, study tips, test taker success stories and more.