The video tutorial explores the interaction of functions, focusing on addition and subtraction in graph contexts. It introduces odd and even functions, highlighting their symmetries. The tutorial demonstrates graphing techniques using new methods and confirms results both visually and algebraically.

What is the primary purpose of introducing addition and subtraction of functions?

• To make calculations easier

• To simplify complex equations

• To eliminate the need for graphing

• To understand functions better and graph new types of functions

What type of symmetry does the function x^3 - x exhibit?

• Reflective symmetry

• Even symmetry

• No symmetry

• Rotational symmetry

How can you identify the function f(x) = 2x - 1 on a graph?

• By its x-intercept at -2 and shallower gradient

• By its x-intercept at 1 and steeper gradient

• By its y-intercept at 2 and shallower gradient

• By its y-intercept at -1 and steeper gradient

What is the significance of the x-intercepts when adding two functions graphically?

• They are irrelevant in function addition

• They indicate where the new function will pass through

• They help in finding the y-intercept of the new function

• They determine the slope of the new function

What is the y-value at the point of intersection of f(x) and g(x) when added together?

• 0

• 10

• 5

• 15

What is the result of adding the functions f(x) = 2x - 1 and g(x) = x + 2 algebraically?

• x + 1

• 2x + 3

• 3x - 1

• 3x + 1

How does the gradient of the new function compare to the original functions when added?

• It is the difference of the two gradients

• It is the sum of the two gradients

• It is the average of the two gradients

• It is the same as the steeper function

What is the y-intercept of the new function formed by adding f(x) and g(x)?

• 3

• 2

• 1

• 0

Why is it important to confirm the visual method of adding functions with algebra?

• To ensure the graph is drawn to scale

• To simplify the graphing process

• To verify the accuracy of the visual method

• To eliminate errors in calculations

What does the gradient of 3 indicate about the new function?

• It is less steep than the original functions

• It is a horizontal line

• It is steeper than the original functions

• It has no slope