One common denominator is 45
Answer:
2 units because there is no change in size.
Only (a) describes a one-to-one function. (b) fails because
; similarly, (c) fails because
.
The vertex is exactly in the middle of the two intersections with the x axis.
So, it's in the middle of x=3 and x=9.
What's the middle of 3 and 9? You can find this by calculating the average.
(3+9)/2 = 6
So, the vertex is at x = 6.
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