,UPP]CASE ,DELTA ,SAMPLES #1_4 ,UPP]CASE DELTA ;Y : M1NS ! *ANGE 9 ;Y IS WRITT5 .,DY #2_4 ,UPP]CASE DELTA ;X EQUALS ;X SUB TWO M9US ;X SUB "O IS WRITT5 .,DX .K X2-X1 #3_4 ,! =MULA = SLOPE ;M EQUALS OP5 FRAC;N UPP]CASE DELTA ;Y OV] UPP]CASE DELTA ;X CLOSE FRAC;N IS WRITT5 M .K ?.,DY/.,DX# #A