Perpendicular would have a slope of 1/8 and a line paralell to y=-8 would be y=-8+5 because they have the same slope but different y-intercepts.
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When the value of a slope of a line gets smaller, the line on a graph gets flatter.
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4:3 would be the ratio in its simplified form.
1.5 lawns and 49.5 lawns you might want to make the .5’s a fraction so they won’t think it’s a calculator or right it as a rate if you are doing unit rates