Algebra I
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Direct Variation and Slope-Intercept Form Practice Worksheet
Identify the slope and y-intercept for each equation, and then graph the equation.
Determine the slope and y-intercept from the graph and then write an equation for that line.
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Algebra I
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9. Describe direct variation and provide an equation that is an example of direct variation.
10. Fred drew the graph below for the equation
reasoning.
. What error did he make? Explain your
Algebra I
Name:
11. The graph shows the relationship between the number of gallons of fuel in the tank of an airplane
and the weight of the airplane.
a. Write an equation where x is the number of gallons of fuel
and y is the weight of the airplane to model this situation.
b. What does the slope represent?
b. Use the equation that you wrote to predict the weight of the airplane when the tank contains
25 gallons of fuel.
12. Explain how you graph the equation of a line in the form
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14. Explain how you would write an equation of a line that was graphed on a coordinate plane.