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two ways :
1. calculate the slope of the two lines, if it is same, they are parallel.
2. draw a perpendicular line ( 90 degrees) from on of the lines and if it intersects the other line at 90degrees then they are parallel
-HD
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Do parallel lines need to look the same in a graph?
they need to look parallel
Will the graph of a system of parallel lines intersect at exactly 1 point?
Parallel lines don't intersect, no matter how many of them there are.
Lines drawn parallel to the axes of the graph?
Lines drawn parallel to the axes have only one letter.y=5 is horizontal, parallel to the x-axisx=5 is vertical , parallel to the y-axis.
Is there a way you can you tell if the corresponding lines are parallel?
If you can find the slope of both lines, then yes you can tell. The slope for parallel lines is the same - so if your slopes are the same, your lines are parallel. If you are measuring (less exact) the lines will be the same distance apart everywhere.
How many solutions will a system have if the graph of the solution is not parallel lines?
infinitely many solutions :)
