5.1 Review Worksheet, Part 1 (continued)
21. A fishing lake was stocked with 300 bass. Each year, the population decreases by 25. The population of bass in the lake after x years is represented by the function f ( x ) = 300 − 25 x. a. Graph the function and find its intercepts.
b. What does each intercept represent?
22. Julie is running a 5-kilometer race. She ran 1 kilometer every 5 minutes. Julie’s distance from the finish line after x minutes is represented by the function = − f x x ( ) 5 .
1 5
a. Graph the function and find its intercepts.
b. What does each intercept represent?
Use intercepts to graph the line described by each equation.
1 2
23. 4 x − 6 y = 12
24. 2 x + 3 y = 18
25.
− = x y
4 4
26. y − x = − 1
27. 5 x + 3 y = 15
28. x − 3 y = − 1
5.1.3 Rate of Change and Slope 29. The table shows the length of a baby at different ages. Find the rate of change for each time interval. Round your answers to the nearest tenth. During which time interval did the baby have the greatest growth rate? Age (mo) 3 9 18 26 33 Length (ln.) 23.5 27.5 31.6 34.5 36.7
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