SOLUTION: I need help on this question.... each setoff coordinates below are generated by a linear rule. for each set of coordinates, write an equation to describe the rule. {-1,-7}{0,-3

Algebra ->  Functions -> SOLUTION: I need help on this question.... each setoff coordinates below are generated by a linear rule. for each set of coordinates, write an equation to describe the rule. {-1,-7}{0,-3      Log On


   

Question 853197: I need help on this question....
each setoff coordinates below are generated by a linear rule. for each set of coordinates, write an equation to describe the rule.
{-1,-7}{0,-3}{1,1}{2,5}{4,13}{5,17}
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
A liner rule is of the form y = x+a. The first coordinate in the pair is x. What do you have to add or subtract to/from it to get the second coordinate, which is y?


(-1,-7) y = x + a == -7 = -1 + a


-6 = a. So the equation is y = x -6


(0,-3) y = x + a == -3 = 0 + a == -3 = a. The equation is y = x - 3


(1,1) There is no difference so y=x


(2,5) The difference is 3. y = x+3


(4.13) The difference is 9. y=x+9


(5,17) y=x+12