FORECAST function

[Tyre]

=FORECAST(x,known_y's,known_x's)

can the range be replaced with given points instead?

[Mark W.]

Define "points".

[Tyre]

points:
for example:
the range "known_x's" is B3:B9
the range "known_y's" is C3:C9

can the FORECAST be used for series of points, or x-values (like 1,3,5)

[Mark W.]

On 2002-04-10 14:20, Tyre wrote:
points:
for example:
the range "known_x's" is B3:B9
the range "known_y's" is C3:C9

can the FORECAST be used for series of points, or x-values (like 1,3,5)

Sure, a single array formula such as...

{=FORECAST({4;5;6},{10;20;30},{1;2;3})}

...can be entered into 3 contiguous, vertically oriented cells (e.g., A1:A3) to produce...

{40;50;60}

Note: This is an array formula which must be entered using the Control+Shift+Enter key combination. The outermost braces, { }, are not entered by you -- they're supplied by Excel in recognition of a properly entered array formula.