How do I use a graph to solve the solution of the system of equations #y=−2x−4# and #y+4=−2x#?

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Answer 1 · 2015-07-09T21:23:47

You graph the equations and see where they intersect.

Your equations are

#y = -2x-4#
#y+4 = -2x#

Let's rearrange these to

(1) #y = -2x-4#
(2) #y = -2x-4#

The two equations are identical.

You don't have to plot the graphs, because they coincide.

There is an infinite number of solutions.