Which of the following affects the rate constant of a reaction?

a. the entropy of the reaction
b. the enthalpy of the reaction
c. the volume of the system
d. the temperature of the system

The horizontal blue line through the middle of the lens is called the optical axis. as the lamp is moved above or below the axis, keeping the horizontal distance to the center of the lens constant, how does the horizontal distance from the lens to the image change?