What can be said regarding a line if its slope is i. positive ii. zero iii negative?

What can be said about a straight line if its slope is positive ?

What can be said about a straight line if its slope is negative ?

What can be said about a straight line if its slope is zero ?

If the velocity of an object is increasing and changing at a uniform rate then the acceleration of the object is "(i) Positive (ii) Zero" " (iii) Negative (iv) Not defined"

Zero is neither positive nor negative.

Zero is not an integer as it is neither positive nor negative.