All of the following are characteristic of nonverbal communication except:
a) nonverbal communication usually conveys more information than verbal communication
b) nonverbal communication is the secondary means of communicating emotion
c) nonverbal communication is metacommunicative
d) nonverbal communication is present in most interpersonal conversations

a) nonverbal communication usually conveys more information than verbal communication

Explanation:

Nonverbal communication or body language is facial expressions, body movement, gestures, eye contacts, and chats which make a communication better. Nonverbal communication is important because it improves or facilities verbal communication. If verbal and nonverbal clues match, they increase trust, otherwise they can cause stress, tension, confusion, and mistrust.  

But it does not convey more information, therefore, Option a is the answer.  

A) The rate of change is -30, and it represents the number of songs taken off of her download list each week.
The initial value is 150, and it represents the number of songs she wants to download to begin with.

B) y = -30x + 150

Explanation
A) The rate of change can be found by using the slope formula between the first two points, (0, 150) and (1, 120):
m=(y₂-y₁)/(x₂-x₁) = (120-150)/(1-0) = -30/1 = -30

The initial value is the y-value of the first point on the graph, (0, 150).

B) The equation is in slope-intercept form, y=mx+b, where m represents the slope and b represents the y-intercept.  The slope is the rate of change that we found in part A; the y-intercept is the initial value we found in part A.  This gives us the equation y=-30x+150.