# Algebra

posted by
**Shirley** on
.

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