Lab moderna: add p9

Change-Id: I2bbcf8606379a44825edd03b0020179b4205af6a
diff --git a/quad12/labmoderna/p9/dades/regressio.txt b/quad12/labmoderna/p9/dades/regressio.txt
new file mode 100644
index 0000000..ba7012e
--- /dev/null
+++ b/quad12/labmoderna/p9/dades/regressio.txt
@@ -0,0 +1,6 @@
+X Y
+# n lambda/2, sin(theta)
+77.4 0.2351
+154.8 0.4695
+232.2 0.7009
+309.6 0.9323