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yadi64
13.01.2020 •
Mathematics
Suppose that f(x) = x3 and g(x) = -2x^3 - 7. which statement best compares the graph of g(x) with the graph of f(x)?
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Ответ:
Stretched vertically, flipped over x axis, shifted 7 units down
Explanation:
Going from y = x^3 to y = 2x^3 means the graph is pulled vertically so that each (x,y) point has the y coordinate that is doubled. Example: (1,1) turns into (1,2). If this applies to all the points, then the graph is stretched vertically by a factor of 2
Going from y = 2x^3 to y = -2x^3 flips the graph over the y axis. For example, the point (1,2) flips to (1,-2). The x coordinate stays the same with the y coordinate flipping in sign.
The last transformation is the shifting 7 units down which is taken care of by the "-7" tacked at the end. Essentially we subtract 7 from each y coordinate. Example: (1,-2) becomes (1,-9)
Ответ:
x intercept (-9/2 , 0)
y intercept (0,3/2)
Step-by-step explanation:
-2x + 6y = 9
To find the y intercept let x =0 and solve for y
-2 (0) +6y = 9
6y = 9
Divide by 6
6y/6 = 9/6
y = 3/2
(0,3/2)
To find the x intercept let y =0 and solve for x
-2 x +6(0) = 9
-2x=9
Divide by -2
-2x/-2 = 9/-2
x = -9/2
(-9/2 , 0)