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HelloKitty17
 one year ago
Help please
HelloKitty17
 one year ago
Help please

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HelloKitty17
 one year ago
Best ResponseYou've already chosen the best response.0Which graph shows the quadratic function y = 3x2 + 12x + 14? A B C D

OregonDuck
 one year ago
Best ResponseYou've already chosen the best response.1You could always go with the old school approach of actually computing some values and looking at the graph! x=0 is a good candidate because it is trivial to compute. y=3x2+12x+14=3(0)2+12(0)+14=14 Any graph not containing a curve going through (0,14) can immediately be rejected. Unfortunately, none of the graphs actually show the yintercept, probably to prevent this approach from being so easy :) Next choice is x = 2 which certainly does appear on two of the graphs: y=3(2)2+12(2)+14=12+24+14=50 We can reject B and D because they do have a point at x=2 and it isn't y=50 To decide between A and C, you could do x = 1 or x = 2, 1 is a bit easier: y=3(−1)2+12(−1)+14=3−12+14=5 Graph C is the one that goes through the point (1,5) so it is our choice.
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