Step by step
The question
Question: is (3, −1) a solution of y = −x + 2.
y = −x + 2
is (3, −1) a solution?
1 Read x and y
The first number is always x.
The second is y.
So x = 3 and y = −1.
(3, −1) → x = 3, y = −1
Careful!
Do not swap them.
The first number in (3, −1) is x.
Careful: not x = −1, y = 3 ✗
2 Put them in
Put x = 3 and y = −1 in.
(−1) =? −3 + 2
Work out each side.
Is −1 equal to −1?
Yes.
True!
−1 = −1 true
It is true.
So (3, −1) is a solution.
(3, −1) is a solution
Let's look back.
First: read x and y.
Last: put them in.
Answer
(3, −1) is a solution