- #1
Richie Smash
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- 15
Homework Statement
There is a function y= 3+x-2x2
X values are as follows: -3, -2, -1, 0, 1, 2, 3.
Y values are as follows:-18, -7, 0, 3, 2, -3,-12.
Each x value corresponds to the y value below it after going through the function.
I have plotted a graph using a scale of 1 cm on the Y axis and a scale of 2 cm on the X axis, I have obtained a Parabola opening downwards.
Now the Question says, '' Using your graph or otherwise, determine the range of values of x for which x -2x2>-6.
Homework Equations
The Attempt at a Solution
Now, I guess I can do this by substituing every x value into that inequality... but is there a faster way to do this
But in doing so I got -2 is less than or equal to x which is less than or equal to 2
Also how can I look at my graph and know this?
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