Saturday
October 25, 2014

Homework Help: Algebra

Posted by Shirley on Sunday, December 2, 2007 at 2:06pm.

Can someone check my answers?

1. Write the equation of the line that passes through point (2, 3) with a slope of 4.

Answer: y = -4x - 5

2. Find the slope and y-intercept.
x = 8
Answer: Slope: undefined; y-intercept: none

3. Write the equation of the line which has y-intercept (0, 5) and is perpendicular to the line with equation y = 3x + 1.

Answer: y = 1/3x + 5

4. Write the equation of the line passing through (4, 4) and (4, 2).

Answer: x = 4

5. Determine which two equations represent perpendicular lines.

A. y = 4/7x 3

B. y = 3x 4/7

C. y = -1/3x + 4/7

D. y = 1/3x 4/7

Answer: b and c

6. Find the y-intercept.
x + 3y = 15
Answer: (0,5)

7. Determine which two equations represent parallel lines.

A. y = 5/3x + 4

B. y = -3/5x 7

C. y = 2x + 8

D. y = 2x 4

Answer: c and d

8. Find the slope of the line passing through the points (7, 4) and (1, 10).

Answer: -1

9. Find the slope of the line passing through the points (9, 4) and (0, 4).

Answer: 0

10. Find the slope of the line passing through the points (4, 0) and (4, 5).

Answer: Undefined

11. An employee who produces x units per hour earns an hourly wage of y = 0.35x + 11 (in dollars). Find the hourly wage for an employee who produces 2 units per hour.

Answer: $11.70

12. Which of the ordered pairs
(3, 1), (0, 4), (4, 0), (3, 7)
are solutions for the equation x y = 4?

Answer: (0, 4) and (3, 7)

13. Find the slope of the line passing through the points (8, 3) and (2, 2).

Answer: 5/6

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