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*It is either TRUE or FALSE. If c value is TRUE or omitted, then it is calculated normally.
*It is either TRUE or FALSE. If c value is TRUE or omitted, then it is calculated normally.
*If <math>c</math> value is FALSE, then <math>c=0</math>, and <math>y=mx</math>. Here <math>y</math> is required. <math>x</math>,<math>x_1</math> and <math>c</math> are optional.
*If <math>c</math> value is FALSE, then <math>c=0</math>, and <math>y=mx</math>. Here <math>y</math> is required. <math>x</math>,<math>x_1</math> and <math>c</math> are optional.
*If <math>x</math> value is omitted, then it is assumed to be the array{1,2,3..} which is the same size of <math>y</math>. If <math>x_1<math> value is omitted, then it is assumed to be the same size of <math>x</math>.
*If <math>x</math> value is omitted, then it is assumed to be the array{1,2,3..} which is the same size of <math>y</math>. If <math>x_1</math> value is omitted, then it is assumed to be the same size of <math>x</math>.
*If both <math>x<math> and <math>x_1<math> are omitted, then they are assumed to be the array {1,2,3..} which is the same size of y.
*If both <math>x</math> and <math>x_1</math> are omitted, then they are assumed to be the array {1,2,3..} which is the same size of y.
*<math>TREND</math> function is used for polynomial curve fitting by regressing against the same variable raised to different powers.
*<math>TREND</math> function is used for polynomial curve fitting by regressing against the same variable raised to different powers.
*When entering an array constant for an argument such as x, use commas to separate values in the same row and semicolons to separate rows.
*When entering an array constant for an argument such as <math>x</math>, use commas to separate values in the same row and semicolons to separate rows.
==Examples==
==Examples==