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stevenabdullatif16
07.02.2021 •
Mathematics
WILL MARK BRAINLIEST HELP ASAP!! A caterpillar crawling in a straight line across a coordinate plane starts at point (—3, —4) and ends at point (25, 38). Counting the start point and end point, how many points with integer coordinates does the caterpillar touch?
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Ответ:
15
Step-by-step explanation:
The slope =![\frac{change in y}{change in x} =\frac{38+4}{25+3} =\frac{42}{28} =\frac{3}{2}](/tpl/images/1100/0525/ba0cc.png)
This means that when the caterpiller moves 2 units to the right, it moves 3 units up. Since 42/3 = 28/2 = 14. this happens 14 times from (-3, -4) to (25, 28). Counting the starting point (-3, -4) we get 14 + 1 = 15 points with integer coordinates.
Ответ:
We can use 3 facts:
So, to find our x and our y we can do:
You'll notice, though, that there were two solutions for
, which means we have a positive and a negative for our x. So: