Joel built 9 birdhouses today. He used 6 pieces of wood for each
birdhouse. How many pieces of wood did Joel use?

1. 14
2. 3
3.54
4.56

How can you tell when x and y are not directly proportional?

Which of the following shows the graph of y=2e^x?

Find a parametrization for the curve「and determine the work done on a particle moving along γ in r3 through the force field f: r^3--r^3'where f(x,y,z) = (1,-x,z) and (a) im (γ) is the line segment from (0,0,0) to (1,2,1) (b) im (γ) is the polygonal curve with successive vertices (1,0,0), (0,1,1), and (2,2,2) (c) im (γ) is the unit circle in the plane z = 1 with center (0,0,1) beginning and ending at (1,0,1), and starting towards (0,1,1)