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Can you help me with my math homework?
Ok the question is:
A line with slope -5/2 passes through points (7,-4) and (?,6)
Can you tell me step by step on how to find the ? because in my class we did not learn this yet and its just extra credet and trust me i really need it
2 Answers
- 1 decade ago
To find a slope, the formula used is: slope = (y1 - y2) / (x1 - x2)
in your problem,
slope = -5/2
y1= -4
y2= 6
x1= 7
x2 = ?
-5/2 = (-4-6) / (7-?)
-5/2 = (-10) / (7-?)
(-10) / (-5/2) = 7 - ?
4 = 7 - ?
? = 7 - 4
? = 3
- 1 decade ago
The person above me did this in a different, but still effective way. The easier way, my opinion, is by using the formula:
y2-y1
-------
x2-x1
and labeling your ordered pairs to distinguish between putting in correct order.
(7,.4) (?,6)
x1y1 x2y2
6-4 2
-----= ----- = 1/-3
?-7 .6
