is f(x)=x(x+5) a linear function?
Let us expand that
\(\sf f(x)=x(x+5)\)
\(\sf f(x)=x^2+5x\)
Since it has \(\sf x^2\) in it, it is now a linear function.
So the answer is \(\sf \boxed{No, ~this~ is~ not~ a ~linear ~function.}\)
f(x)= x(x+5)
= x²+5x
this is not a linear function as it is not in the form y=mx+b
it is a quadratic function with x intercepts at 0 and -5 and y intercept 5