How to determine the number of solutions in a linear system without solving: y = 3x - 2 and 3x + y + 2 = 0 ?
1 Answer
Mar 15, 2016
1 solution
Explanation:
They are both straight line graphs.
The first has gradient of +3 and the second has gradient -3 so they cross. As they are straight lines they can only cross once.
They both have a constant that is the value of -2. Thus they cross at
