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find a quadratic function in standard for that has the following points: (1,2); (2,2); (3,4).
 one year ago
 one year ago
find a quadratic function in standard for that has the following points: (1,2); (2,2); (3,4).
 one year ago
 one year ago

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dumbcowBest ResponseYou've already chosen the best response.1
plug each point into equation: \[y = ax^{2} +bx +c\] this will give 3 equations with 3 variables (a,b,c) solve system of 3 equations with matrices or elimination
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
how do i place them in that equation without an a b and c ?
 one year ago

dumbcowBest ResponseYou've already chosen the best response.1
for (1,2) ..... x=1 and y=2 ==> 2 = a*(1)^2 + b*1 + c > 2 = a+b+c
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
if i plug it in wouldnt a still be squared or somethin ?
 one year ago

dumbcowBest ResponseYou've already chosen the best response.1
a is not squared ... the "x" is squared
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
oh. okay so after i do that do i add all of them together ?
 one year ago

dumbcowBest ResponseYou've already chosen the best response.1
well you need to know how to solve a system of 3 equations
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
what do you mean ?
 one year ago

dumbcowBest ResponseYou've already chosen the best response.1
after plugging in the points, you get a + b +c = 2 4a +2b +c = 2 9a + 3b +c = 4 you need to solve for a,b,c
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
im trying to write down and figure which numbers can work for all three
 one year ago

Beautiful_Lier96Best ResponseYou've already chosen the best response.0
omg thank you. i was going to be thinking forever. and im extra tired. i know i shoulda did it by myself but idk. may you help me with one more question: The weight of a tennis ball must be 57.7 grams, plus or minus 1.7 grams. write an absolute value inequality to illustrate this rule...
 one year ago

dumbcowBest ResponseYou've already chosen the best response.1
"Oh my god, thank you. I would have been thinking about this for a long time, and I'm extra tired today. I know that I should have solved it on my own. Can you help me with another problem..." 57.7x<1.7
 one year ago
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