A book store was selling 5 books for 27.25. Online you could buy 6 books for 32.16. Which place has a lower unit price?
1 answer:
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Answer:
A line parallel to the line y = x -4 would have a slope of 1.
A line perpendicular to the line y = x -4 would have a slope of -1.
Remember, parallel lines are lines that never intersect, which means that they cannot possibly have different slopes. A perpendicular line will <em>always</em> have the opposite slope as the first line, because the two lines must intersect at a 90 degree angle. The attached image shows how this works.
Hope this helps you out!
