Answer:
B. (x+4)(x+i)(x-i)
Step-by-step explanation:
Let 
We can factor this polynomial by grouping:

We factor further to obtain:


We apply difference of two squares to get:

Number of possible combinations = (4x3) ÷ 2 = 6
Answer: There are 6 possible combinations.
The slope is 5.
And the y-intercept is 0.
Hope I helped! <3