------------------------------------------------------------------------------------------ Equation ------------------------------------------------------------------------------------------ y = -3x - 9
------------------------------------------------------------------------------------------ Option 1 ------------------------------------------------------------------------------------------ If I substitute x = -9, I should get y = 0
When x = -9 y = -3 (-9) - 9 = 18 (I did not get 0, wrong)
------------------------------------------------------------------------------------------ Option 2 ------------------------------------------------------------------------------------------ If I substitute x = -3, I should get y = 0 y = -3(-3) - 9 y = 9 - 9 y = 0 (Yes, I got 0, correct)
------------------------------------------------------------------------------------------ Option 3 ------------------------------------------------------------------------------------------ If I substitute x = 0, I should get y = -3 y = -3 (0) - 9 y = 0 - 9 y = -9 (I did not get -3, wrong)
------------------------------------------------------------------------------------------ Option 4 ------------------------------------------------------------------------------------------ If I substitute x = 0, I should get y = -9 y = -3 (0) - 9 y = 0 - 9 y = -9 (Yes, I got -9, correct)
------------------------------------------------------------------------------------------ Answer: (-3, 0) and (0, 9) are ordered pairs of the equation (Answer B, D) ------------------------------------------------------------------------------------------
A line of best fit can only be drawn if there is strong positive or negative correlation. The line of best fit does not have to go through the origin. The line of best fit shows the trend, but it is only approximate and any readings taken from it will be estimations.
