Linear Equations

• one solution

• no solutions

• infinitely many solutions

Write the equation of the line that passes through the point (1, -1) and has a slope of -4.

• y = -4x + 3

• y = -4x - 3

• y = -4x + 5

• y = -4x - 5

Paul the plumber charges $25 for a service call.  He then charges $100 an hour.  Write a linear equation to model this situation.

• y = 100x

• y = 25x

• y = 25x + 100

• y = 100x + 25

What is the equation of this line?

• x=-2

• y=-2x

• x=2

• y=-2

Write an equation in slope-intercept form from the points (0, 5) and (4, 3)

• y = 5x + 5

• y = 2x + 5

• y = 2x - 5

• x = 5

Solve:
7x - 3x - 8 = 24

• 8

• -8

• 3.2

• 4

Solve:
7x + 19 = -2x + 55

• 4

• 14.8

• 8.2

• -4

Write an equation in slope-intercept form from the points (-4, 0) and (1, 5)

• y = x - 4

• y = x + 4

• x = y + 4

• y = 4x + 4

Find the equation of the line in slope-intercept form.

• y = - 1/4x - 3

• y = 1/3x + 3

• y = - 1/4x + 2

• y = 1/3x -3

The solution to this system is:

• No solution

• (0, 1)

• (0, -2)

• (4, 3)