Answer:
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Step-by-step explanation:
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It seems that the four graphs are the same and they do not have a negative change rate in the interval 0 to 2 in the x-axis.
A negative change rate means that when x increases the value of the function (y) decreases; this is, the function is decreasing in the interval being estudied, which is the same that going downward.
So, you must look for in your graphs where the equation is going downward.
For example, in the graph attached, that happens in any interval from negative infitity to 1.5.
The vertex will help you to identify it.
Given that the graph goes downward from negative infinity to the vertex, any interval that includes that range will have negative change.
You must look for a parabola that opens upward and whose vertex is in x = 2.
So first we distribute
1/3(9a-18)
a three can be factored out of (9a-18)=3(3a-6)
so 1/3 times 3(3a-6)=3a-6
so the equation end up as 6-a=3a-6
add 6 to both sides
12-a=3a
add a to both sides
12=4a
divide both sides by 4
3=a
so there is one solution or A
A good estimate would be -10.
In order to estimate, start off by rounding both numbers to the nearest whole number. -7.94 can be rounded to -8 because the first number to the right of 7 is greater than 5. 2.31 can be rounded to 2 because the first number to the right of the 2 is less than 5.
After rounding, the expression becomes -8-2, which is equal to -10.