Math Is Fun Forum

yorkmanz

Member

Registered: 2019-01-12

Posts: 13

help intercepts

2. Which of the following parabolas opens upward and appears narrower than y=−3x ^2 +2x−1 ?
o A. y= 4x^2 −2x−1
o B. y= − 4x^2 +2x−1
o C. y= x^2 +4x
o D. y= − 2x^ 2 +x+3

Answer:
A

CORRECT OR NOT

3. Which of the following parabolas is 2 units higher than y=2x^ 2 −4x−1 , but has the same shape and opens in the same direction?
o A. y=2x^ 2 −6x−1
o B. y=2x^ 2 −2x−1
o C. y=2x^ 2 −4x−3
o D. y=2x^2 −4x+1

Answer
D

CORRECT OR NOT

4. What are the coordinates of the vertex of the parabola y=x ^2 +2x−1 ?
o A. (−2,5)
o B. (−1,−2) ………
o C. (−2,−1)
o D. (−1,2)

Answer
B

CORRECT OR NOT

5. Which of the following equations has an axis of symmetry with the equation x=1.5 ?
o A. y=2x^ 2 −6x−1
o B. y=2x^ 2 −3x+1
o C. y=x ^2 +6x−3
o D. y=2x^ 2 +3x+2

Answer
A

CORRECT OR NOT

THANKS MUCH

Bob

Administrator

Registered: 2010-06-20

Posts: 10,619

Re: help intercepts

hi yorkmanz

Welcome to the forum.

Looks like you've got these sorted ; I agree with all your answers.

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob