Is the line for the equation y = 1 horizontal or vertical? what is the slope of this line? select the best answer.

the line is horizontal. the slope is 0.
the line is horizontal. the slope is 1.
the line is vertical. the slope is undefined.
the line is vertical. the slope is 0.

slope 0, equation y = 1

Step-by-step explanation:

Think: every point on this line features 1 as the y value.  Thus, the line must be horizontal, and its equation is y = 1.  The slope is 0.  (First answer choice)

1gm = 1000mg so 0.1gm = 1000mg

first, convert the weight to kg

160lb * 1kg/2.2lb = 72.7kg

next, the dose

72.7kg * 100mg/kg = 7270mg

4x and 6y

im not sure though