If finally i plot a graph between and feature for example X[i] and y_ then why it isnt coming a straight line . In this case why its called linear regression if the line is not straight?
The final plot between feature and y_
hey @Sid10 ,
The task you are performing is multiple linear regression where we have multiple independent features and a single target/dependent variable.
Linear Regression assumes these multiple features to be one feature with one target variable , then only we can plot a linear straight line between these two.
for example :
lets X = [ “Age”,“Height” ,“Weight” ] and Y = “Score”
so , if we combine these 3 X’s variables into 1 -> Z , then we can have linear relationship between Z and Y .
but if we try to get a linear Relationship between Age and Score while training using all independent features , we will not achieve any such linear relationship in them.
and hence , you didn’t get a straight line between them.
I hope this would have resolved your doubt.
Thank You.
Happy Coding. 
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