Linear Functions Review

Which equation is a linear equation?

• 4m² = 6

• 3a + 5b = 3

• 
• x² + y^{2 = 0}

Which equation matches the line graphed?

• y = 2x

• y = -2x

• y = x

• y = -x

Which equation represents a direct variation?

• y = 14x + 8

• y = -2x - 4

• y = 8x

• y = 14x + 14

Which equation is in standard form?

• -3x - y = 12

• 3x - y = 12

• y = -3x - 12

• -1/2 x + 1/2 y = 6

Write the equation in standard form:

y + 1 = -2x - 3

• 2x + y = -4

• y = -2x - 4

• -2x - y = 4

• x + 1/2 y = -2

Find the slope of the line through (3, 7) and (-1, 4).

• 4/3

• 3/4

• 11/2

• 2/11

Find the slope of the line through (-3, 2) and (6, 2).

• 4/9

• 4/3

• 0

• Undefined

What is the slope of a vertical line?

• 1

• 0

• -1

• undefined

Which graph has a slope of -3?

• 
• 
• 
• 

In 1996 there were 171 area codes in the United States.

In 2007 there were 215.

What is the rate of change from 1996 to 2007?

• 44

• 4

• 1/4

• -4