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kelseydavid69
07.12.2021 •
Mathematics
Which is the graph of f(x) = 2(3)*?
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Ответ:
First option (top left)
Step-by-step explanation:
Since the coefficient of this equation,
, is 2, when x is 0, then y must be 2. The graph must have a y-intercept of 2. You can find this by plugging this in.
I cannot see the fourth graph, but the second graph does not have a y-intercept of 2, therefore it can immedeately be ruled out.
Then we plug in the coordinates they give.
It just so happens that the first one,
is indeed equal to 6.
We can check that this is right by disproving the third one (top right).
The fourth one is definetly wrong because the y-value at x=2 (as we have already calculated) is 18, not 12.
Therefore, our first answer, the one on the top left, is correct.
note: for this problem you did not even need to find the y-intercepts. Plugging in the coordinates would be fine by its own (the second answer choice is already wrong just because of the coordinates since 9≠6(found in answer choice 1)). However, having the y-intercept handy will be very helpful if there is more than one answer choice with correct coordinates.
Ответ:
the answers are A and C
Step-by-step explanation:
edge 2020