Expression 7: "f" left parenthesis, "x" , right parenthesis equals "m" left parenthesis, "x" minus "x" Subscript, 1 , Baseline , right parenthesis plus "y" Subscript, 1 , Baselinefx=mx−x1+y1
7
Expression 8: "m" equals StartFraction, "y" Subscript, 2 , Baseline minus "y" Subscript, 1 , Baseline Over "x" Subscript, 2 , Baseline minus "x" Subscript, 1 , Baseline , EndFractionm=y2−y1x2−x1
equals=
0.7 50.75
8
Expression 9: "b" equals negative "m" "x" Subscript, 1 , Baseline plus "y" Subscript, 1 , Baselineb=−mx1+y1
equals=
2.52.5
9
y=${m}x+${b} left parenthesis, 4 , "f" left parenthesis, 4 , right parenthesis minus 1 , right parenthesis4,f4−1
Label:
equals=
left parenthesis, 4 , 4.5 , right parenthesis4,4.5