How do you solve the system of equations by graphing and then classify the system as consistent or inconsistent #3y − x = 4# and #y + 2x = −1#?
1 Answer
Graph each of the linear equations using a pair of points for each.
If the graphed lines intersect then the equations are consistent (and have a mutual solution at their intersection point).
Explanation:
For the equation
I found (arbitrary) solutions:
For the equation
I found (again, arbitrary) solutions:
Using each pair of points, we can plot lines:
or, combining them on a single graph:
We can see that the equations are consistent (since they intersect).