Functions: Practice 22

In this Grade 8 lesson on Functions, you will practice solving problems like: "If f(x) = 3x + 4, what is f(-2)?". Work through each problem carefully, use the hints if you need help, and check your answers. This builds your understanding of functions step by step.

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If f(x) = 3x + 4, what is f(-2)?

1Read the problem carefully: "If f(x) = 3x + 4, what is f(-2)?"

Problem 1 of 5

1

Problem 1

If f(x) = 3x + 4, what is f(-2)?

Problem 2 of 5

2

Problem 2

If f(x) = 1x + 2, and f(x) = 1, what is x?

Problem 3 of 5

3

Problem 3

If f(x) = 1x + 7, and f(x) = 14, what is x?

Problem 4 of 5

4

Problem 4

If f(x) = 4x + 9, what is f(5)?

Problem 5 of 5

5

Problem 5

If f(x) = 6x + 0, what is f(-3)?

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You got 0 of 5 right.

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🌍 Where you'd use this: Anytime someone says 'figure out X if you know Y' — you're doing algebra.

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🏆 Try this week: Find one real-life situation today that uses an unknown. Write the equation for it.

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Functions: Practice 22

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Functions: Practice 22

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