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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?

-4

-1

4 (correct)

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

(2, 0), (0, -3) (D) Signup and view all the answers

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

Horizontal line (D) 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?

$y = x - 7$ (B) Signup and view all the answers

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

y = 2x + 1 (D) Signup and view all the answers

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

x – 3y = 3 (A) Signup and view all the answers

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

y = 2x + 1 (C) Signup and view all the answers

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

3x + y = 4 (A) 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.

85 (B) Signup and view all the answers

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

78 (A) 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?

$155.00 (A) Signup and view all the answers

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

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