Question

List five ordered pairs for the function y = 2x – 1.

Answer 1

Put any value of x to the equation of the function and calculate y.

y = 2x - 1

for x = -2 → y = 2(-2) - 1 = -4 - 1 = -5 → (-2, -5)

for x = -1 → y = 2(-1) - 1 = -2 - 1 = -3 → (-1, -3)

for x = 0 → y = 2(0) - 1 = 0 - 1 = -1 → (0, -1)

for x = 1 → y = 2(1) - 1 = 2 - 1 = 1 → (1, 1)

for x = 2 → y = 2(2) - 1 = 4 - 1 = 3 → (2, 3)

Answer: (-2,-5); (-1,-3); (0,-1); (1, 1); (2; 3)

Answer 2

(1,1)
(2,3)
(0,-1)
(3,5)
(4,7)
it’s actually very simple, all you have to do is plug in whatever value you want for x and then solve the problem. once you have done that you put it in this format: (x,y)
for example, the first ordered pair that i told you: (1,1)
i got this by first deciding to use 1 as my x-value, then plugging it into the equation, so it was y=2•1-1. from there you just solve for y, which is very simple. make sure you remember order of operations though, or you could get it wrong! from that step i just put it in ordered pair format, or (x,y). this made my first ordered pair, which was (1,1). you can use the same steps for all ordered pairs you want to find. i hope this helps!