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Sagot :
- A line passes through (9,2) and (12,-4).
- So, x = 9, y = 2
- x = 12, y = -4
For the 1st equation,
- 2x + y = 20
- Putting x = 9, y = 2
- or, 2 (9) + 2 = 20
- or, 18 + 2 = 20
- or, LHS = RHS
- Now, putting x = 12, y = -4 in the above equation, we have
- 2(12) + (-4) = 20
- or, 24 - 4 = 20
- or, LHS = RHS.
- So we can see that the first equation is the equation of the line.
- This is given in the graph in the picture.
- Like this way, if we check with other equations, we see that they are not the required equation of the line.
Answer:
A. 2x + y = 20
Hope you could get an idea from here.
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