What is the equation of the line in the graph?

(added picture)

a. y = x + 4
b. y = x – 4
c. y = 2x – 2
d. y = 2x + 4

i think it's either a or b. i'm leaning more towards a but i could be terribly wrong..

The cross-sectional areas of a right triangular prism and a right cylinder are congruent. the right triangular prism has a height of 6 units, and the right cylinder has a height of 6 units. which conclusion can be made from the given information? the volume of the triangular prism is half the volume of the cylinder. the volume of the triangular prism is twice the volume of the cylinder. the volume of the triangular prism is equal to the volume of the cylinder. the volume of the triangular prism is not equal to the volume of the cylinder.

Which of the following graphs could represent a quartic function?

Which expression is equivalent to -12(3x-3/4)