Unit 2 Review

What is the definition of function?

• Has inputs and outputs
• Every input has only ONE output
• Inputs have different outputs every time
• x-values and y-values

• Function
• Not a Function

• Function
• Not a Function

Which of the following relations is a one-to-one function?

• {(0,2), (0,4), (0,5), (0,6)}

• {(1,3), (4,3), (8,3), (3,1)}

• {(5,-1), (6,3), (1,2), (7,-8)}

• {(1,2), (3,4), (-1,-2), (1,5)}

What direction is an undefined slope?

• horizontal
• vertical

Write the equation for the line in slope-intercept form.

• y=-1x+3
• y=4x+3
• y=¼x+3
• y=-4x+3

Write the slope intercept form of the equation x - 3y = 6

• y = -x - 2

• y = x + 2

• y = 1/3x - 2

• y = -1/3x + 2

Write the equation of the line with slope 3/5 through the point (20, 6).

• y = 3/5x - 6
• y = 3/5x +18
• y = 3/5x - 18
• y = 3/5x +6

Solve the system of equations by elimination.
-x + y = -13
-8x - 4y = -8 

• (5, 8)
• (5, -8)
• (-5, -18)
• (-5, 8)

Determine if (4, 1) is a solution for the system of equations.
y = -x + 5
y = 2x - 7

• yes
• no