Using PROC REG to write prediction equations

[JUMMY]

I have a data of this form:

data brand;
	input preference moisturecontent sweetness @@;
	datalines;
	64 4 2 73 4 4 61 4 2 76 4 4 72 6 2 80 6 4 
	71 6 2 83 6 4 83 8 2 89 8 4 86 8 2 93 8 4
	88 10 2 95 10 4 94 10 2 100 10 4
	;
run;
proc print;
run;


proc reg data=brand;
model preference=moisturecontent sweetness;
run;

So I used PROC REG to write out the prediction equation. How to I write a separate prediction equation between brand liking and sweetness when moisture content equals to 4 and when moisture content equals to 10? 

[Reeza]

Your code isn't correct. you can't have 'BY MAKE' since you have no make variable.

It's not quite clear what you question is, can you please clarify in detail?

[JUMMY]

@Reeza, I apologize for the mistake. I have corrected it. PROC REG gives the multiple regression line for the data. But I want to come up with two different equations for preference and sweetness when moisture content equals to 4 and when moisture content equals to 10.

[Reeza]

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@JUMMY wrote:

@Reeza, I apologize for the mistake. I have corrected it. PROC REG gives the multiple regression line for the data. But I want to come up with two different equations for preference and sweetness when moisture content equals to 4 and when moisture content equals to 10.

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Put that variable in the BY statement too. The BY statement can take multiple variables and will do it by nested groups. 

By make sweetness;