Algebra Unit Review

What is the equation of the line through the points (4,2) and (-3,-5) in slope intercept form.

• y =1x +2
• y = x - 5
• y = x -2
• y - 2 = (x - 4)

Write the equation of the following graph.

• y = 4/3 x - 2
• y = -2x + 3
• y = 3/4x - 2
• y = - 4/3 x - 2

Which equation doesn't represent a function?

• y = 4
• x = 8
• y = |x - 1| + 3
• y = -x²

How is the graph of y = (x+3)² - 4 transformed from it's parent graph?

• right 3   down 4
• left 3 down 4
• down 4 and compressed horizontally
• left 4 and compressed horizontally

How does the equation y = -|x| + 5 differ from its parent function?

• reflected over the x-axis and left 5
• reflected over the y-axis and down 5
• reflected over the y-axis and right 5
• reflected over the x-axis and up 5

If you have data representing the relationship between the boiling temperature of water at different altitudes; how would you explain the correlation between the two variables given the correlation coefficient, r =- 0.99? 

• strong positive correlation
• strong negative correlation
• weak positive correlation
• weak negative correlation

Which equation is represented by the following graph?

• y + 5 = 1/2(x - 4)
• y - 3 = 1/2 (x - 0)
• y + 5 = -1/2 (x - 4)
• y -4 = -1/2 (x -2)

A delivery truck can carry at most 2400 lbs of tables & chairs. The average table, t, weighs 30 lbs & an average chair, c, weighs 10 lbs. 
Write an inequality that describes this situation.

• 30t + 10c <(or equal to) 2400
• 30t + 10c < 2400
• 30t + 10c > 2400
• 30t + 10c >(or equal to) 2400

Which equation would best describe the following graph?

• y = | x - 4| - 4
• y = |x + 3| + 4
• y = |x + 3| - 4
• y = | x -3| + 4

Which piece-wise function would best represent this graph?

• f(x) = -2x if x<= -1
                  -3if -1<  x < 4
                    x + 2 if x >= 4  
• f(x) = -2x if x< -1
                  -3if -1<=  x <= 4
                    x + 3 if x > 4  
• f(x) = -2x if x< -1
                  -3if -1<=  x <= 4
                    x + 2 if x > 4         
• f(x) = 2x if x< -1
                  -3if -1<=  x <= 4
                    x + 2 if x > 4