What is the most efficient way to solve this system of equations, and why?
3x+4y=-1
y=-x

The most efficient way to do this is by plugging in -x to y

Work:

3x+4(-x)=-1

3x-4x=-1

x=1

Ifound this on google “that means that the graph of a function with direct variation has these features: it is a straight line: because the slope is the ratio y/x = k. it passes through the origin (0,0): because y = kx = k (0) = 0.” i hope this you for what your looking for