Question

If y – 1 = 4x, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs? plz help will give medal


{(1, 4), (2, 8), (3, 12)}
{(4, 1), (8, 2), (12, 3)}
{(0, 1), (1, 5), (2, 9)}
{(1, 0), (5, 1), (9, 2)}

Answer 1

y-1=4x

add one

y=4x+1

now just plug each x coordinate of each answer and see if the y input is correct.

Answer 2

would i add 1 to 2,8 to ??

Answer 3

or do i add the 8

Answer 4

This is your function

y=4x+1

if i wanted to test the coordinate (1,4)

I'd plug 1 as x and see if 4 becomes y.

y=4(1)+1

y=5

1,4 is a invalid solution

Answer 5

oh i get it ok thx