Plot the point (3,0):



Now look at the slope.  .

The numerator is 2.  It is a negative fraction. So we draw
a line 2 units long downward from that point (3,0).
(Downward because the fraction is negative. It is upward when
the slope fraction is positive)

That's the green line below:




Now we look back at the slope.  .

The denominator is 3. So we draw a line 3 units long to the right
from the end of that green line that.
(We ALWAYS draw the denominator number to the RIGHT!)

That's the other green line below:




Now we take a ruler and draw a line through (3,0) and the end of the
second green line, like this  




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Note: on some problems, the slope is not a fraction but a whole number.
In that case, just put a 1 under the whole number and it will be a
fraction.  For instance 5 is the fraction .

Edwin