Gr 11 Math Ch 5: Average Gradient
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Questions and Answers

What is the average gradient of a curve between two points A and C?

  • The gradient of the curve at point C
  • The difference in y-coordinates of points A and C
  • The gradient of the tangent to the curve at point A
  • The gradient of the straight line passing through points A and C (correct)

What is the formula for the average gradient of a curve between points P(a, f(a)) and Q(a + h, f(a + h))?

  • (f(a + h) - f(a))/h (correct)
  • (f(a + h) - f(a))/a
  • (f(a + h) + f(a))/h
  • (f(a + h) × f(a))/h

What is the purpose of the concept of average gradient in calculus?

  • To describe the rate of change of a curve between two points (correct)
  • To calculate the gradient of a curve at a single point
  • To find the maximum value of a function
  • To find the equation of a curve

In the derivation of the average gradient formula, what happens to the value of h?

<p>h approaches zero (D)</p> Signup and view all the answers

What is the gradient of the curve g(x) = x^2 at point P(a, g(a))?

<p>2a (C)</p> Signup and view all the answers

What is the average gradient of the line AC with points A(x_A, y_A) and C(x_C, y_C)?

<p>(y_A - y_C)/(x_A - x_C) (D)</p> Signup and view all the answers

What is the average gradient of the curve between points A and C, given points A(x_A, y_A) and C(x_C, y_C)?

<p>(y_A - y_C) / (x_A - x_C) (A)</p> Signup and view all the answers

What does the average gradient of a curve represent?

<p>The gradient of the line passing through two points (B)</p> Signup and view all the answers

Given points P(a, f(a)) and Q(a + h, f(a + h)) on a curve, what is the expression for the average gradient?

<p>(f(a + h) - f(a)) / h (B)</p> Signup and view all the answers

In the derivation of the average gradient formula, what is the role of point Q(a + h, f(a + h))?

<p>It is used to find the average gradient between P and Q (A)</p> Signup and view all the answers

What happens to the value of h in the average gradient formula?

<p>It approaches zero (B)</p> Signup and view all the answers

What is the relationship between the average gradient and the gradient at a point?

<p>The average gradient approaches the gradient at a point as h approaches zero (C)</p> Signup and view all the answers

What is the main difference between the gradient of a curve and the average gradient of a curve?

<p>The gradient of a curve is the gradient of the tangent to the curve, whereas the average gradient is the gradient of the secant. (C)</p> Signup and view all the answers

Given a curve f(x) with points P(a, f(a)) and Q(a + h, f(a + h)), what is the expression for the average gradient in terms of a and h?

<p>f(a + h) - f(a) / h (A)</p> Signup and view all the answers

If the average gradient of a curve f(x) between points P(a, f(a)) and Q(a + h, f(a + h)) is 2a + h, what is the curve f(x) equivalent to?

<p>x^2 (C)</p> Signup and view all the answers

What is the significance of the point Q(a + h, f(a + h)) in the derivation of the average gradient formula?

<p>It is the point used to calculate the average gradient over an interval. (C)</p> Signup and view all the answers

What happens to the value of the average gradient as the distance between points P and Q approaches zero?

<p>The average gradient approaches the gradient of the curve at point P. (D)</p> Signup and view all the answers

Given a curve g(x) = x^2, what is the average gradient between points P(a, g(a)) and Q(a + h, g(a + h)) in terms of a and h?

<p>2a + h (C)</p> Signup and view all the answers

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