How does understanding the characteristics of public speaking affect how you view a speech?
a. it you understand the purpose of the speech,
b. it teaches you about who the speaker is,
c. it you determine how effective the speech is,
d.
it allows you to take better notes on the speech,
e
it you become more like the speaker,

Option (C)

It helps you determine how effective the speech is;

Explanation:

The purpose of public speaking is be to convey information, tell a story, inspire people to act or encourage people. Public Speaking ensures the effectiveness of a speech. Intentionally, this style of speech is organized with three general purposes: to educate, convince and entertain.

Understanding when it is most successful in public speaking and how it is done perfectly is key to understanding its significance.

check above link.

graphically?   well, you graph them both, the solutions is where they both intersect each other, since there are two solutions, meaning they will meet twice, or namely the linear will run into the quadratic curve twice, and where they meet, those x,y coordinates are the solutions to the system.