Unit 4 Linear Equations Study Guide

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Questions and Answers

Which of the following represents the equation of the line graphed below?

  • 2x – y = 4
  • x – 2y = 8
  • x + 2y = 8
  • 2x + y = 4 (correct)

What is the equation of the line represented by the graph below?

  • 5x – 3y = 3
  • 5x + 3y = 3
  • 3x – 5y = 5 (correct)
  • 3x + 5y = 5

In the equation 4x – y = 4, what is the y-intercept?

  • 1
  • -4
  • -1
  • 4 (correct)

What are the x- and y-intercepts of the equation 12x – 8y = 24?

<p>(2, 0), (0, -3) (D)</p> Signup and view all the answers

What type of line is represented by the equation y = -2?

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

Which of the following represents a linear equation with a slope of 1 and a y-intercept of -7?

<p>$y = x - 7$ (B)</p> Signup and view all the answers

What is the slope of a line parallel to the line 5x – 2y = 18?

<p>y = 2x + 1 (D)</p> Signup and view all the answers

What is the slope of a line perpendicular to the line y = -3x + 2?

<p>x – 3y = 3 (A)</p> Signup and view all the answers

Which equation represents a line parallel to y = -4x + 5 and passes through the point (-2, -1)?

<p>y = 2x + 1 (C)</p> Signup and view all the answers

Which equation represents a line perpendicular to 3x – 5y = 5 and passes through the point (9, -14)?

<p>3x + y = 4 (A)</p> Signup and view all the answers

Use the line of best fit to predict the number of students enrolled in Beach Manor Preschool in 2010.

<p>85 (B)</p> Signup and view all the answers

Estimate Luke’s score for week 12 using the line of best fit from the given data.

<p>78 (A)</p> Signup and view all the answers

How many prints can MaryAnn order from the online print shop with $35 to spend?

Signup and view all the answers

How much did the Jones Family pay for renting the pontoon boat at Smith Mountain Lake Boat Rentals?

<p>$155.00 (A)</p> Signup and view all the answers

How many wreaths did Alaina sell if she made $543 from selling poinsettias and wreaths?

<p>$27 each, approximately 18 wreaths (B)</p> Signup and view all the answers

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