Question

Which ordered pairs from the replacement set are solutions to the equation?
y = -2x + 9 ; Replacement Set {((-1, 11), (0, 8), (1, 7), (2, 5)}

(-1, 11)
(0, 8)
(1, 7)
(2, 5)

@dusty

Answer 1

this one is pretty tuff lol

Answer 2

yeah I know right?

Answer 3

really hard...

Answer 4

trials and error :)

Answer 5

what? lol

Answer 6

it means u just trial one by one, if error miss it :P
for example :
for the point (-1,11) it is given x=-1 and y=11
so, just prove is that point on the line true y=-2x+9
11 = -2(-1) + 9
11 = 2 + 9
11 = 11
so, it is right

Answer 7

what is the aswer, just so I can proove

Answer 8

for (0, 8) ---> x=0, y = 8
y = -2x + 9
8 = -2(0) + 9
8 = 9
LHS not equal RHS
this is incorrect :)

Answer 9

now, can u prove for the point (1,7) ?

Answer 10

7 = -2 + 9
7=7

Answer 11

just prove is LHS equal or not equal with RHS

Answer 12

so, that's right as the solution too

Answer 13

the last point ?

Answer 14

okay

Answer 15

thanks

Answer 16

you're welcome