Question 153525
As you look at the graph from left to right (increasing x), if the line is going up(increasing y), slope is positive.
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),green(line( -5, -10, 5, 2)))}}}
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If it's going down (decreasing y), slope is negative.
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),green(line( -5, 5, 5, -3)))}}}
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If it's horizontal (constant y), slope is zero.
{{{drawing( 300, 300, -5, 5, -5, 5,grid( 1 ),green(line( -5, 3, 5, 3)))}}}