Which situation could be represented by a linear function?
a) for every car i sell, my daily salary doubles.
b) for every car i sell, my daily salary increases by 2%.
c) for every car i sell, i earn a commission of $200 per car.
d) for every car i sell, i earn a commission of 5% of the sale price.

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)