# Which Solutions Work? (2)

In this worksheet, students state whether or not the given solution fits the formula. Key stage:  KS 3

Curriculum topic:   Algebra

Curriculum subtopic:   Use Standard Mathematical Formulae

Difficulty level:   ### QUESTION 1 of 10

Given the formula y = 2x + 3, we can test to see whether the solution  (4,10) works.

Remember that in (4,10), the first number is the x number so this means that

x = 4 and  y = 10

We substitute x = 4 into the formula to see whether it gives y = 10.

y = 2x + 3

y = 2 times x + 3

y = 2 x 4 + 3

y = 8 + 3

y = 11

So x = 4, y = 10 does not fit.

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 3, y = 4

(1, -8)

(1, 8)

x = 3, y = -4

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 1, y = 1

x = 4, y = 2

(1, 12)

(1, 9)

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 3, y = 7

x = 8, y = 1

(1, 8)

(2, 6)

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 4, y = 2

x = 3, y = 5

(-1, 12)

(-2, 6)

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

(0, 10)

x = -1, y = 12

x = 1, y = 12

(-3, 16)

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.
x = -1, y = 7

(3, 3)

(3, 7)

x = 3, y = -1

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.

x = -2, y = 1

x = 3, y = 1

(-3, 11)

(-3, -11)

Which of the following solutions fit the formula? ....   y = -3x - 2

Choose all of the correct answers.
x = 4, y = -14

x = 7, y = -19

(3, -11)

(19, 7)

Which of the following solutions fit the formula? ....   y = -3x - 2

Choose all of the correct answers.
x = 10, y = 28

x = 1, y = -5

(0, -2)

(7, -23)

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.
x = 3, y = -1

(0, 5)

(-2, 9)

x = 5, y = 15

• Question 1

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 3, y = 4
(1, 8)
• Question 2

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 4, y = 2
• Question 3

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

(1, 8)
(2, 6)
• Question 4

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

x = 4, y = 2
(-1, 12)
• Question 5

Which of the following solutions fit the formula? ....   y = 10 - 2x

Choose all of the correct answers.

(0, 10)
x = -1, y = 12
(-3, 16)
• Question 6

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.
x = -1, y = 7
x = 3, y = -1
• Question 7

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.

(-3, 11)
• Question 8

Which of the following solutions fit the formula? ....   y = -3x - 2

Choose all of the correct answers.
x = 4, y = -14
(3, -11)
• Question 9

Which of the following solutions fit the formula? ....   y = -3x - 2

Choose all of the correct answers.
x = 1, y = -5
(0, -2)
(7, -23)
• Question 10

Which of the following solutions fit the formula? ....   y = -2x + 5

Choose all of the correct answers.
x = 3, y = -1
(0, 5)
(-2, 9)
---- OR ----

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