Homework Functions

Homework – Functions

1 .The graph of a function is given at the right a) State the value of f(-1) b) Estimate the value of f(2) c) For what values of x is f(x) = 2 d) Estimate the values of x such that f(x)=0 e) State the domain and range of f f) On what interval is f increasing

2. The graphs of f and g are given at the right a) State the values of f(-4) and g(3) b) For what values of x is f(x) = g(x) c) Estimate the solution of the equation f(x) = -1 d) On what interval is f decreasing e) State the domain and range of f f) State the domain and range of g

3. You put some ice cubes in a glass, fill the glass with cold water, and then let it sit on a table. Describe how the temperature of the water changes as time passes. Then sketch a rough graph of temperature as a function of time.

4. Sketch a rough graph of the outdoor temperature as a function of time during a typical spring day.

5. A homeowner mows the lawn every Wednesday afternoon. Sketch a rough graph of the height of the grass as a function of time over the course of a four week period.

6. The population P (in thousands) of San Jose from 1984 to 1994 is shown in the table.

t 1984 1986 1988 1990 1992 1994 P 695 716 733 782 800 817

a) Draw a graph of P as a function of time b) Estimate the population in 1991 7. Sketch each function and find the domain a) f(x) = 3 – 2x b) f(x) = x2 + 2x – 1

8. A rectangle has a perimeter of 20m. Express the area of the rectangle as a function of length of one of the sides.

9. Express the area of an equilateral triangle as a function of the length of a side.

10. An open rectangular box with volume 2 m3 has a square base. Express the surface area of the box as a function of the length of a side of the base.