Expression 18: "y" equals 0.6 3 "x" minus 1.5 7y=0.63x−1.57
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y = a x + b ⇔
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A = a, C = b, B = -1
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Expression 22: "x" Subscript, 1 , Baseline equals StartFraction, negative "b" plus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionx1=−b+b2−4ac2a
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Expression 23: "y" Subscript, 1 , Baseline equals "f" left parenthesis, "x" Subscript, 1 , Baseline , right parenthesisy1=fx1
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Expression 24: "x" Subscript, 2 , Baseline equals StartFraction, negative "b" minus StartRoot, "b" squared minus 4 "a" "c" , EndRoot Over 2 "a" , EndFractionx2=−b−b2−4ac2a
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Expression 25: "y" Subscript, 2 , Baseline equals "f" left parenthesis, "x" Subscript, 2 , Baseline , right parenthesisy2=fx2
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Expression 27: "x" Subscript, 3 , Baseline equals left brace, "B" equals 0 : StartFraction, negative "C" Over "A" , EndFraction , right bracex3=B=0:−CA
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Expression 28: "y" Subscript, 3 , Baseline equals left brace, "B" equals 0 : "f" left parenthesis, "x" Subscript, 3 , Baseline , right parenthesis , right bracey3=B=0:fx3
