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KiArUnsYu
Group Title
What is the range of the graph of y = −2x2 − 8x − 7?
y ≥ 1
y ≤ 1
y ≤ −2
All real numbers
 2 years ago
 2 years ago
KiArUnsYu Group Title
What is the range of the graph of y = −2x2 − 8x − 7? y ≥ 1 y ≤ 1 y ≤ −2 All real numbers
 2 years ago
 2 years ago

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Mr.Me Group TitleBest ResponseYou've already chosen the best response.1
\[y=2x ^{2}8x7\] is this the equation?
 2 years ago

Mr.Me Group TitleBest ResponseYou've already chosen the best response.1
if so you need to find the maximum or minimum value of this function. It is quadratic so it will be a parabola and upside down since the x^2 term is negative
 2 years ago

KiArUnsYu Group TitleBest ResponseYou've already chosen the best response.0
how do you find the range?
 2 years ago

Mr.Me Group TitleBest ResponseYou've already chosen the best response.1
The range is all the possible values of y. so since this is a parabola there will be a maximum for y but no minimum. Do you know how to calculate derivatives/
 2 years ago

Mr.Me Group TitleBest ResponseYou've already chosen the best response.1
do you have a graphing calculator?
 2 years ago

Mr.Me Group TitleBest ResponseYou've already chosen the best response.1
so 1. graph this equation 2. press 2nd and hit the trace button. 3.Choose option number 4 4. move the cursor to the left of the highest point on the graph and press enter 5. move the cursor to the right of the highest point and press enter 6. press enter again 7. look on the bottom of the screen you will see an x= and y= the y value is the maximum value of y and the range is that value and everything else below it. Let me know what you get
 2 years ago

KiArUnsYu Group TitleBest ResponseYou've already chosen the best response.0
y less than or equal to 1?
 2 years ago

KiArUnsYu Group TitleBest ResponseYou've already chosen the best response.0
yay!! thanks!
 2 years ago
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