The graphs of y = f(x) and y = g(x) are shown on the coordinate plane below. if g(x) = k* f(x), what is the value of k?

Consider this option:
1. according to the attached graph the equation for line f is f(x)=2x-3 (it is easy to determine it using coordinates of points (0;-3) and (2;1));
2. according to the graph the equation for line g is g(x)=-4x+6 (using coordinates of points (0;6) and (2;-2)).
3. according to the condition g(x)=k*f(x), k=g(x)/f(x)=(-4x+6)/(2x+3)=-2.

-2

Idon’t understand sorry