1. Run a multiple linear regression using GAP revenue as the dependent variable and all variables in the X1 variables file as the independent variables. Report the regression line.
2. Perform a global F test to determine if the model is valid at the 5% significant level.
3. Interpret the coefficient for GDP.

Date	GDP	Interest rate	Employment
3/30/1990	5974.665	8.3333	72.4
6/29/1990	6029.504	8.0433	72.1
9/28/1990	6023.332	7.9700	71.7
12/31/1990	6054.867	6.7133	71.2
3/29/1991	6143.612	6.0133	71.0
6/28/1991	6218.425	5.7000	70.9
9/30/1991	6279.296	4.9133	70.7
12/31/1991	6380.798	4.1233	70.7
3/31/1992	6492.299	3.8933	70.9
6/30/1992	6586.548	3.2700	70.9
9/30/1992	6697.553	3.4400	70.7
12/31/1992	6748.182	3.1400	70.9
3/31/1993	6829.594	3.1333	71.2
6/30/1993	6904.222	3.1400	71.3
9/30/1993	7032.844	3.2833	71.4
12/31/1993	7136.259	3.4500	71.6
3/31/1994	7269.847	4.3467	71.8
6/30/1994	7352.255	4.8567	72.1
9/30/1994	7476.661	5.8633	72.6
12/30/1994	7545.296	6.1833	72.7
3/31/1995	7604.923	6.0100	72.5
6/30/1995	7706.531	5.7567	72.5
9/29/1995	7799.493	5.7167	72.5
12/29/1995	7893.146	5.2767	72.5
3/31/1996	8061.535	5.3933	72.7
6/30/1996	8159.043	5.4800	73.1
9/30/1996	8287.078	5.4100	73.2
12/31/1996	8402.060	5.4433	73.2
3/31/1997	8551.940	5.6900	73.4
6/30/1997	8691.756	5.6000	73.7
9/30/1997	8788.320	5.7300	73.7
12/31/1997	8889.732	5.5533	73.8
3/31/1998	8994.738	5.5900	73.9
6/30/1998	9146.521	5.5267	73.8
9/30/1998	9325.650	5.1967	73.9
12/31/1998	9447.103	4.9000	74.0
3/31/1999	9557.005	4.9767	73.9
6/30/1999	9712.280	5.3833	73.9
9/30/1999	9926.101	6.0600	74.0
12/31/1999	10031.031	6.0333	74.2
3/31/2000	10278.340	6.5733	74.3
6/30/2000	10357.445	6.6267	73.9
9/30/2000	10472.285	6.5900	74.0
12/31/2000	10508.121	5.2567	73.9
3/31/2001	10638.384	4.0967	73.4
6/30/2001	10639.486	3.3367	72.8
9/30/2001	10701.317	2.0567	72.3
12/31/2001	10834.445	1.8233	72.2
3/31/2002	10934.752	1.8333	71.9
6/30/2002	11037.057	1.7600	71.9
9/30/2002	11103.834	1.4867	71.7
12/31/2002	11230.078	1.2633	71.5
3/31/2003	11370.653	1.1667	71.3
6/30/2003	11625.137	1.0700	71.0
9/30/2003	11816.827	1.1033	71.1
12/31/2003	11988.403	1.0533	71.2
3/31/2004	12181.398	1.2467	71.1
6/30/2004	12367.744	1.7033	71.2
9/30/2004	12562.163	2.2500	71.3
12/31/2004	12813.729	2.7833	71.3
3/31/2005	12974.083	3.2300	71.5
6/30/2005	13205.445	3.7367	71.7
9/30/2005	13381.629	4.2967	71.6
12/31/2005	13648.904	4.7200	71.8
3/31/2006	13799.794	5.1767	71.9
6/30/2006	13908.498	5.3933	72.1
9/30/2006	14066.370	5.3233	72.2
12/31/2006	14233.226	5.3100	72.0
3/31/2007	14422.313	5.3167	71.7
6/30/2007	14569.675	5.4233	71.7
9/30/2007	14685.330	5.0233	71.6
12/31/2007	14668.445	3.2300	71.5
3/31/2008	14812.974	2.7567	71.2
6/30/2008	14842.983	3.0567	70.7
9/30/2008	14549.949	2.8167	70.0
12/31/2008	14383.885	1.0833	68.7
3/31/2009	14340.417	0.6167	67.9
6/30/2009	14384.145	0.3000	67.3
9/30/2009	14566.511	0.2233	66.6
12/31/2009	14681.063	0.2067	66.8
3/31/2010	14888.600	0.4233	66.8
6/30/2010	15057.660	0.3367	66.7
9/30/2010	15230.208	0.2800	66.5
12/31/2010	15238.371	0.2833	66.7
3/31/2011	15460.926	0.2200	66.5
6/30/2011	15587.125	0.2867	66.6
9/30/2011	15785.312	0.4233	66.8
12/31/2011	15973.881	0.3300	67.0
3/31/2012	16121.851	0.3000	67.0
6/30/2012	16227.939	0.2667	67.1
9/30/2012	16297.349	0.2333	67.4
12/31/2012	16475.440	0.2200	67.2
3/31/2013	16541.390	0.1967	67.3
6/30/2013	16749.349	0.1233	67.5
9/30/2013	16999.888	0.1267	67.4
12/31/2013	17031.324	0.1233	67.8
3/31/2014	17320.921	0.1133	68.0
6/30/2014	17622.257	0.1267	68.2
9/30/2014	17735.933	0.1333	68.5
12/31/2014	17874.715	0.1500	68.5
3/31/2015	18093.224	0.1500	68.7
6/30/2015	18227.689	0.2400	68.7
9/30/2015	18287.226	0.3600	68.9
12/31/2015	18325.187	0.5500	69.3
3/31/2016	18538.039	0.5600	69.2
6/30/2016	18729.130	0.7000	69.3
9/30/2016	18905.545	0.7700	69.5
12/31/2016	19057.705	0.9200	69.8
3/31/2017	19250.009	1.0800	70.0
6/30/2017	19508.986	1.2400	70.2