Module 8 Review

f(x) = 3x + 12    g(x) = 4x + 10 
What is f(x) = g(x)? 

• x = 4 1/2 
• x = 2
• x = 12 
• x = 1

If a correlation coefficient is equal to 0.72, what kind of correlation will that be? 

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

y = 3x + b 
(3,5) Find what b equals. 

• 0
• 14
• 1
• -4

Which is the last step in seeing if data is accurate? 

• Finding the line of best fit 
• Plotting a graph 
• finding the slope 
• finding the regression 

Find the inverse of f(x) = 5x + 3

• (-5 + x) / 3 = y
• (-3 + x) / 5 = y
• (-x + 5) / 3 = y
• None of the above 

If the actual value of an equation is 15 and the predicted value is 3, what is the residual? 

• 18
• -3
• 12
• -12

What is another name for squared residuals? 

• Slope 
• R²
• Regression 
• Linear modification 

What is important to remember when drawing your line of best fit? 

• To make it always positive 
• To make it always negative 
• To have an even number of points above and below the line 
• To have your line go through at least 2 points on the graph

What would be a number representing a weak correlation? 

• -1
• -.5
• 0
• .5

In the equation y = mx + b 
What does b mean? 

• x-intercept 
• slope 
• y-axis 
• y-intercept