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find the value of a such that the points (3,2) , (1,-4) and (a, 6) all lie on the same line. 

 
 Jan 12, 2019

Best Answer 

 #1
avatar+313 
+2

the slope of the two known points is (-4-2)/(1-3) or -6/-2 which is 3, and the slope of (a, 6) and (3, 2) must also be 3 for them to all be on the same line. the slope of those two points is (6-2)/(a-3), which must be 3, so 4/(a-3) is 3, and 4=3a-9, so 3a=13 and a=13/3.

 

HOPE THIS HELPED!

 
 Jan 12, 2019
 #1
avatar+313 
+2
Best Answer

the slope of the two known points is (-4-2)/(1-3) or -6/-2 which is 3, and the slope of (a, 6) and (3, 2) must also be 3 for them to all be on the same line. the slope of those two points is (6-2)/(a-3), which must be 3, so 4/(a-3) is 3, and 4=3a-9, so 3a=13 and a=13/3.

 

HOPE THIS HELPED!

 
asdf335 Jan 12, 2019
 #2
avatar+94300 
0

Nice, asdf.....!!!!

 

 

cool cool cool

 
CPhill  Jan 12, 2019

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