Question

look at the following points.
(4,0), (3,-1), (6,3), (2,-4)

which are solutions to y=x-4 choose all the correct answers.
-6,3
-4,0
-3,-1
-2, -4

Answer 1

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Answer 2

do you know how to read the information that a point gives you?

Answer 3

not really..

Answer 4

points are defined for x and y values, they are read as: (x,y)

take the first point for an example: (4,0) , this tells us that x=4 and y=0

Answer 5

makes sense!

Answer 6

in order to determine of it satisfies the given equation; just plug in the values to see if they produce a true result

Answer 7

so would it be the last one?

Answer 8

y = x-4 , try the point (4,0): x = 4, and y = 0
| |
v v
0 = 4 - 4

does 0 = 4-4 ?

Answer 9

yes!

Answer 10

then (4,0) is a good point :)

lets test the last one (2,-4), x=2 and y=-4

y = x-4
| |
v v
-4 = 2 - 4

does -4 = 2-4 ?

Answer 11

no!

Answer 12

then we would want to avoid that one since it doesnt fit ....

test out the remiaing points in the same way to see if they fit or not

Answer 13

x y
3,-1
y=x-4
3= -1 -4
false.

Answer 14

that right?

Answer 15

remember to keep an eye on where the x and y values get placed. I know its easy to mix them up.

Answer 16

x y
3,-1

y = x-4
3= -1 -4
^ ^
youve placed them in the wrong spots

Answer 17

x y
3,-1

y = x -4
-1= 3 -4
^ ^
this is how we want them to go; y for y and x for x

Answer 18

since -1 = 3-4, this point is good

Answer 19

thanks!

Answer 20

good luck :)