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Math / Algebra / Grade 8 / ml8cb

Read a Linear Rule - Practice 2

A linear rule y = mx + b applies a constant rate m to the input and then adds b.

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A linear rule y = mx + b applies a constant rate m to the input and then adds b. The starting amount b is not multiplied by x.

Worked example

For y = 2x + 5, input x = 3 produces 2 x 3 + 5 = 11.

For y = 2x + 5, input x = 3 produces 2 x 3 + 5 = 11.
Worked model: For y = 2x + 5, input x = 3 produces 2 x 3 + 5 = 11.
Question 1 For y = -3x + 8, what is y when x = 1?
Question 2 For y = -3x + 8, what is y when x = 2?
Question 3 For y = -3x + 8, what is y when x = 3?
Question 4 For y = -3x + 8, what is y when x = 4?
Question 5 For y = -3x + 8, what is y when x = 5?