Quadratic function from given points | Desmos

Differential calculus

7

Algebra stuff

15

Algebra, the sequel

22

Expression 23: "k" equals StartFraction, "b" . "x" times "c" . "y" minus "c" . "x" times "b" . "y" Over "b" . "x" times "c" . "x" times left parenthesis, "c" . "x" minus "b" . "x" , right parenthesis , EndFraction

equals

negative 0.0 4 5 1 8 7 7 9 1 9 9 6 7

23

Expression 24: "l" equals StartFraction, "c" . "y" minus "k" left parenthesis, "c" . "x" squared , right parenthesis Over "c" . "x" , EndFraction

equals

1.6 8 2 2 4 6 4 5 3 5 6

24

Expression 25: "k" "x" squared plus "l" "x"

25

26

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