What are the ordered pairs for y=2x+5 (,-9)

Answer 1

If you asking to complete the ordered pair (?, -9) then just plug -9 into the equation in place of y and find out what x value makes the result true.

-9 = 2x + 5

-14 = 2x

x = -7

Any other ordered pair can be determined by picking the value of x you are interested in selecting, plugging it in, and calculating the associated y value then putting that x and y into an ordered pair form (x, y)