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Guest
Guest
Student numbers have increased annually for five years (130,143,159,189,227). I have to predict next 3 years by using linear N=ax+b. (I think I can graph this by guessing at a linear increase through plotting (a) and b would be my start number of students?, x is number of years from start? )
But then I have to use quadratic model N=axsquared +bx+c. How do I estimate the values for constants a,b,c ? Is c the start number of 130? x again the year? a the increase then I solve for b?
How do I graph it on computer please?
Probably too many questions at once.
I do hope you can help. I have been guessing round this for ages.
Annemarie
But then I have to use quadratic model N=axsquared +bx+c. How do I estimate the values for constants a,b,c ? Is c the start number of 130? x again the year? a the increase then I solve for b?
How do I graph it on computer please?
Probably too many questions at once.
I do hope you can help. I have been guessing round this for ages.
Annemarie