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January 12th, 2019, 03:53 PM  #1 
Newbie Joined: Jan 2019 From: tornto Posts: 2 Thanks: 0  Help xintercept 2
2. Which of the following parabolas opens upward and appears narrower than y = âˆ’3x^2 + 2x âˆ’ 1? A. y = 4x^2 âˆ’ 2x âˆ’ 1 B. y = âˆ’ 4x^2 + 2x âˆ’ 1 C. y = x^2 + 4x D. y = âˆ’ 2x^ 2 + x + 3 Answer: A CORRECT OR NOT 3. Which of the following parabolas is 2 units higher than y = 2x^2 âˆ’ 4x âˆ’ 1, but has the same shape and opens in the same direction? A. y = 2x^2 âˆ’ 6x âˆ’ 1 B. y = 2x^2 âˆ’ 2x âˆ’ 1 C. y = 2x^2 âˆ’ 4x âˆ’ 3 D. y = 2x^2 âˆ’ 4x + 1 Answer D CORRECT OR NOT 4. What are the coordinates of the vertex of the parabola y = x^2 + 2x âˆ’ 1? A. (âˆ’2,5) B. (âˆ’1,âˆ’2) â€¦â€¦â€¦ C. (âˆ’2,âˆ’1) D. (âˆ’1,2) Answer B CORRECT OR NOT 5. Which of the following equations has an axis of symmetry with the equation x = 1.5? A. y = 2x^2 âˆ’ 6x âˆ’ 1 B. y = 2x^2 âˆ’ 3x + 1 C. y = x^2 + 6x âˆ’ 3 D. y = 2x^2 + 3x + 2 Answer A CORRECT OR NOT THANKS MUCH Last edited by skipjack; January 12th, 2019 at 09:42 PM. 
January 12th, 2019, 07:05 PM  #2 
Math Team Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 13,780 Thanks: 970 
At how many help sites did you post this?

January 12th, 2019, 09:49 PM  #3 
Global Moderator Joined: Dec 2006 Posts: 20,089 Thanks: 1902 
Well done, yorkmanz, your answers are all correct.


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