Question

Type an equation of the line that passes through the origin with the slope 3

Answer 1

y=3x
It passes through the origin, means the y intercept is 0

Answer 2

Assuming you want slope intercept form:

So slope intercept form is:

y = mx + b

M is the slope and b is the y intercept.

So therefore:

y = 3x + 0

Or 

y = 3x