Question: if all 4 variable increase by 1 unit, according to the table what would be your prediction? I have the answer of increase of 597.9

if all 4 variable increase by 1 unit, according to the table what would be your prediction? I have the answer of increase of 597.9 units but I have no idea how it was obtained. Can you please enlighten me on how I can solve a problem like this that may show up on my exam.

intercept=208.9385

variable1= -2838.32

variable2= 3358.434

variable3=173.1412

variable4= -95.2884

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