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Mrather
 3 years ago
Which equation describes the four ordered pairs (1,3), (0,1), (2,9), (3,13)?
A. y=2x+1
B. y=4x+1
C. y=4x1
D. y=2x1
Mrather
 3 years ago
Which equation describes the four ordered pairs (1,3), (0,1), (2,9), (3,13)? A. y=2x+1 B. y=4x+1 C. y=4x1 D. y=2x1

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sritama
 3 years ago
Best ResponseYou've already chosen the best response.0put the values of x and y in the equations and find in which case 4 of them are satisfying the equation.

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.2Or there's a more systematic way of doing it:

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.2They give you the point (0,1) which is dw:1358396550543:dw your yintercept in the formula y = mx+b, so b = 1 Now for the slope, take two points and calculate it using the slope formula: If we take points (1,3) and (0,1):\[m=\frac{(3)(1)}{(1)(0)}= \frac{4}{1}=4\] So, y = 4x+1

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.2(And I guess you can assume the other points are valid for this equation since there is no option such as "none of the above")

kirbykirby
 3 years ago
Best ResponseYou've already chosen the best response.2What sritama told you is perfectly valid as well, but perhaps a bit more time consuming
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