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In a simple linear regression model (One independent variable), If we change the input variable by 1 unit. How much output variable will change?

In a simple linear regression model (One independent variable), If we change the input variable by 1 unit. How much output variable will change? Correct Answer by its slope

For linear regression Y=a+bx+error. If neglect error then Y=a+bx. If x increases by 1, then Y = a+b(x+1) which implies Y=a+bx+b. So Y increases by its slope.

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