Gr 11 Math Ch 4: Parallel Lines

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Questions and Answers

What is the necessary condition for two lines to be parallel?

  • They have the same slope-intercept form.
  • They have the same gradient. (correct)
  • They have the same x-intercept.
  • They have the same y-intercept.

What form of the equation of a line should be used to easily identify the gradient?

  • Standard form. (correct)
  • Point-slope form.
  • Intercept form.
  • Slope-intercept form.

What is the primary purpose of using the point-slope form when finding the equation of a parallel line?

  • To simplify the equation of the line.
  • To use the given point and gradient to find the equation of the line. (correct)
  • To find the slope of the line.
  • To find the y-intercept of the line.

What should be done to the equation of a parallel line after using the point-slope form?

<p>Simplify the equation to the standard form. (A)</p> Signup and view all the answers

What is a key difference between parallel lines and identical lines?

<p>Their y-intercepts. (B)</p> Signup and view all the answers

Why is it necessary to ensure the given line's equation is in the gradient-intercept form?

<p>To directly read off the gradient of the line. (C)</p> Signup and view all the answers

If two lines are parallel, what can be said about their gradients?

<p>They are equal. (B)</p> Signup and view all the answers

What is the first step in finding the equation of a parallel line?

<p>Identify the gradient of the given line. (B)</p> Signup and view all the answers

What is the primary purpose of using the gradient-intercept form of the equation of a line?

<p>To easily identify the gradient of the line. (C)</p> Signup and view all the answers

If a line has a gradient of 2, what is the gradient of a line parallel to it?

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

What is true about the y-intercepts of parallel lines?

<p>They can be the same or different. (D)</p> Signup and view all the answers

What is the equation of a line parallel to the line y = 2x + 3, passing through the point (1, 5)?

<p>y = 2x + 4 (D)</p> Signup and view all the answers

What is the relationship between the gradients of two parallel lines and their respective y-intercepts?

<p>The gradients are equal, but the y-intercepts can be different. (D)</p> Signup and view all the answers

A line passes through the point (2, 3) and is parallel to the line y = 3x - 2. What is the equation of the line in slope-intercept form?

<p>y = 3x - 1 (C)</p> Signup and view all the answers

What is the primary reason for ensuring the given line's equation is in the standard form y = mx + c?

<p>To easily identify the gradient. (A)</p> Signup and view all the answers

If two lines are parallel, which of the following statements is TRUE?

<p>They have the same gradient and different y-intercepts. (A)</p> Signup and view all the answers

What is the purpose of using the point-slope form when finding the equation of a parallel line?

<p>To find the equation of the parallel line in slope-intercept form. (A)</p> Signup and view all the answers

If a line has a gradient of -2, what is the gradient of a line parallel to it?

<p>-2 (A)</p> Signup and view all the answers

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