Question : SSRS Line Chart with two series

I am attempting to make a simple lines graph using two data series (XWCPM and XGoal) in SSRS 2008.
I want to put the XWeek values along the X axis.
My data is included, below.
Two problems:
1.  Some of the XWCPM values are NULL.  I would like the graph to interpolate those values  and yield a continuous line, with markers only at the points of actual value measurements.

2.  Even though my starting values are zero, the zero does not match up on the X-axis as illustrated in the attached screen shot.

Thank you in advance for any insight you can provide.






XWeek      XDate      XWCPM      XGoal      XYear      XPermnum
0      2009-09-24      1      0      2009      78989
1      NULL      NULL      1.82      2009      78989
2      NULL      NULL      3.64      2009      78989
3      NULL      NULL      5.46      2009      78989
4      NULL      NULL      7.28      2009      78989
5      NULL      NULL      9.1      2009      78989
6      NULL      NULL      10.92      2009      78989
7      2009-11-23      39      12.74      2009      78989
8      2009-11-30      10      14.56      2009      78989
9      NULL      NULL      16.38      2009      78989
10      NULL      NULL      18.2      2009      78989
11      NULL      NULL      20.02      2009      78989
12      NULL      NULL      21.84      2009      78989
13      NULL      NULL      23.66      2009      78989
14      NULL      NULL      25.48      2009      78989
15      NULL      NULL      27.3      2009      78989
16      NULL      NULL      29.12      2009      78989
17      NULL      NULL      30.94      2009      78989
18      NULL      NULL      32.76      2009      78989
19      NULL      NULL      34.58      2009      78989
20      NULL      NULL      36.4      2009      78989
21      NULL      NULL      38.22      2009      78989
22      NULL      NULL      40.04      2009      78989
23      NULL      NULL      41.86      2009      78989
24      NULL      NULL      43.68      2009      78989
25      NULL      NULL      45.5      2009      78989
26      NULL      NULL      47.32      2009      78989
27      NULL      NULL      49.14      2009      78989
28      NULL      NULL      50.96      2009      78989

Answer : SSRS Line Chart with two series

To get the graph to interpolate those values  and yield a continuous line.

In the Properties pane, expand the CustomAttributes node

Set the EmptyPointValue property. To insert empty points at an average of the previous and next data points, select Average. To insert empty points at zero, select Zero.

from

http://blogs.msdn.com/sql_pfe_blog/archive/2009/05/28/chart-behavior-difference-in-sql-reporting-services-2008.aspx