2 Algebra I
4.1-4.3 Study Guide
Name: _____________________________
Period: ______ Date: _________________
Write an equation of the line in slope-­‐intercept form. 1) 3) 2) Write an equation of the line that passes through the given points using point-­‐slope form. 4) 5) Write a linear function f with the given values. 7) 8) 6) Determine which of the lines, if any, are parallel or perpendicular. Explain. 9) 10) 11) An electrician charges $120 after 2 hours of work and $190 after 4 hours of work. a. Write a linear model that represents the total cost as a function of the number of hours worked. b. Find the total cost of hiring the electrician for two days. (A full work day is 8 hours) c. A different electrician does not charge an initial fee, but charges $45 per hour. If you have $600 to spend on the electrician, which would you be able to hire for the greatest amount of time? Explain. 12) The table shows points on a line. Can the situation be modeled by a linear equation? Explain. If possible, write a linear model that represents the line.