Evaluating Function Notation: What Does f(3) Mean?

The video tutorial covers evaluating functions by substituting values into given equations. It starts with evaluating f(4) using the function f(x) = 3x - 5, resulting in f(4) = 7. It then demonstrates evaluating H(-5) using H(x) = x^2, resulting in H(-5) = 25, and G(8) using G(x) = 7x + 2, resulting in G(8) = 58. The tutorial continues with more examples: G(-2), H(7), and F(-1), explaining each step in detail. The video concludes with tips on matching functions with variables and encourages viewers to practice independently.

What are the three functions introduced in the video?

• f(x), g(x), and h(x)

• a(x), b(x), and c(x)

• p(x), q(x), and r(x)

• m(x), n(x), and o(x)

Tags

CCSS.8.F.A.1

CCSS.HSF.IF.A.1

What is the value of f(4) if f(x) = 3x - 5?

• 11

• 7

• 9

• 5

Tags

CCSS.HSF.IF.A.2

What operation is performed to find h(-5) if h(x) = x^2?

• Exponentiation

• Subtraction

• Addition

• Multiplication

Tags

CCSS.HSF.IF.A.2

What is the result of h(-5) if h(x) = x^2?

• 30

• 20

• 25

• 35

Tags

CCSS.HSF.IF.A.2

What is the value of g(8) if g(x) = 7x + 2?

• 60

• 58

• 56

• 54

Tags

CCSS.HSF.IF.A.2

What is the first step in evaluating g(-2), h(7), and f(-1)?

• Subtract the numbers

• Plug the numbers into the respective equations

• Add the numbers

• Multiply the numbers

Tags

CCSS.HSF.IF.A.2

What is the value of g(-2) if g(x) = 5x^2?

• 10

• 15

• 20

• 25

Tags

CCSS.HSF.IF.A.2

What is the value of h(7) if h(x) = 2(x - 2)?

• 12

• 10

• 14

• 8

Tags

CCSS.HSF.IF.A.2

What is the value of f(-1) if f(x) = -8x + 6?

• 14

• 18

• 12

• 16

Tags

CCSS.HSF.IF.A.2

What should you do if you have any questions or comments about the video?

• Ask a friend

• Email the teacher

• Drop a comment below the video

• Ignore them

Tags

CCSS.RI.11-12.8

CCSS.RI.8.7

CCSS.RI.9-10.7

CCSS.RL.11-12.8

CCSS.RL.8.7