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Section 2.2

Equations of Lines

• Find an equation of a line given 2 points
 

• Find an equation of a line given a slope and point


• Convert point-slope form of an equation to slope-intercept form


• Given a graphical representation of a line find an equation


• Write an equation of a vertical or horizontal line


• Given a table of ordered pairs that is exactly linear, find an equation of the line that passes through the points


• Given real data find a linear function that models the data using linear regression on your calculator
  
  
• Predict y values for given x values


• Understand the difference between the terms interpolation and extrapolation


• Given a symbolic representation of a line determine the x- and y-intercepts


• Given a symbolic representation of a line, graph the equation


• Given the graph of a relationship between two variables, interpret the slope, x- and y-intercept


• Solve application problems


• Solve application problems involving direct variation
  


• Understand the term “constant of proportionality” or “constant of variation”
  

• Find the x-intercept on a graph using the zero command in the CALC menu
  


• Find the y-intercept on a graph using the value command in the CALC menu or Y1(0) from the home screen