Answer :

dabnjab
-7 is the y=intercept...a line in point-slope formula will always look like this: y = mx + b with b representing the y-intercept. 
firestarangel26
y=mx+b 
This is the slope intercept-formula.  
Where: 
m=slope
b=y-intercept 

Compare that to the given equation: 
y=3x-7

b=-7 

b=y intercept

Final answer: 
-7 

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