I think I'll just change from other two I posted for this student.
The only thing different is that this one has a whole number 3 for the slope,
and the only difference is that you consider it to have a denominator of 1.
The other tutor showed one way to graph the line, but I think you may just
be starting graphing lines from their equations, and you need this more
elementary method:
. That is in slope-intercept form 
, But since the slope
3 is given as a whole number, change it to 
so that the slope m shows a
DENOMINATOR of 1":
Some teachers teach it this way: "b" stands for "BEGIN" and "m" stands
for "MOVE". You BEGIN at the y-intercept, and then you MOVE from there,
as described below:
the slope is 
and the y-intercept is 
. The
y-intercept, b, means that we BEGIN where the line intersects the y-axis
at the point (0,b), which in this case is the point (0,-2).
[That's where you "BEGIN". (Think of "b" as if it stood for "BEGIN".)
So we mark the y-intercept point (0,-2), like this:
Now we MOVE from the y-intercept (0,-2):
1. The slope is positive so this means from that point we go UPWARD the NUMERATOR of
the slope. (When the slope is negative we go DOWN, but in this case we go UP).
The NUMERATOR of the slope, is 3, and positive, so we draw the line
segment UPWARD from
the y-intercept). So we draw a line segment from the y-intercept (0,-2) up 3
units, from (0,-2) to (0,1), like this:
2. Now from there, at the point (0,1), we draw a line TO THE RIGHT (ALWAYS to
the RIGHT) the DENOMINATOR of the slope, which is 1 unit RIGHT. It goes from
the point (0,1) to the RIGHT to the point (1,1), like this:
Finally we draw a line, through the point we BEGAN at (0,-2), and the point we
MOVED TO or ended up at, (1,1), and that is the graph of the line whose
equation is 
or .
You should LEARN:
1. that a line which has a POSITIVE number for its slope, always
leans to the RIGHT, like this one, and a line which has a NEGATIVE number for
its slope always leans to the LEFT.
2. that the GREATER the (absolute value) of the slope, the STEEPER the line.
3. if the slope is 1 or -1, the line is at an angle of 45o.
If the slope is a fraction or number less than 1, it is LESS STEEP than 45o and
if the slope is a fraction or number greater than 1, it is STEEPER than 45o,
like this one.
Edwin
