This question you are asking is confusing...ask your parents to help you decipher the words first because I don’t understand what your asking means.
The x is horizontal on a graph and then the y axis is vertical on a graph.
Answer:
Step-by-step explanation:

Multiply -1 by -7
-9x^3 + 8x^2 - 7x/6 + 7
Answer:
x = -5/3
Step-by-step explanation:
Hope this helps!
Best of luck!♥