Question

If y = 7x − 5, which of the following sets represents possible inputs and outputs of the function, represented as ordered pairs?

{(−5, 0), (9, 2), (−26, −3)}
{(2, 7), (1, 6), (3, 13)}
{(0, −5), (2, 9), (−3, −26)}
{(1, 3), (6, 18), (8, 15)}

Answer 1

@jim_thompson5910

Answer 2

lets say we pick on {(2, 7), (1, 6), (3, 13)}

Answer 3

(2,7) means x = 2 and y = 7

plug them both into y = 7x - 5

Answer 4

what do you get?

Answer 5

9?

Answer 6

so you plugged in x = 2 and you got 9 as a result?

Answer 7

isn't is 7 times 2 minus 5???

Answer 8

Yes

Answer 9

If it equals 9 then you got a point pair that works

Answer 10

14-5 = 9

Answer 11

so yes, i did get 9 when i plugged it in

Answer 12

=)))

Answer 13

:)

Answer 14

however, notice how the ordered pair is (2,7) and not (2,9)

Answer 15

if choice B had (2,9) then it would be correct

Answer 16

Ah, then B is no good

Answer 17

so its not B

Answer 18

well that piece anyway

Answer 19

yes B is out

Answer 20

okay, ill try c next ?

Answer 21

you should check all of the choices

Answer 22

Yes, I agree, start with point 1 on A and see if that works, then get rid of A if it doesn't

Answer 23

is the answer c?

Answer 24

yes the other choices don't work

Answer 25

C does though

Answer 26

okay! thanks to both of you (: