PLEASE ANSWER

Which equation represents the following graph?

A. y = 2x + 3
B. y = 3x + 2
C. y = -2x + 3
D. y = -3x + 2

Asilkworm winds its cocoon out of one long silk fiber. to make silk thread, 3 to 10 of these silk fibers are unwound from their cocoons and combined into aa single thread with a typical length of 300 yards. choose a reasonable number of silk fibers in a thread write an equation to find the total length of the silk fibersused in 300 yards of the thread

We just started the introduction into circles and i have no idea how to do this.

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi