Which model shows unusual findings in joint and individual significance? Describe the unusual findings. What is the likely cause of this unusual finding?

	Joint Significane	Individual Significance
	Significane F Value	P-Value
Variables		Mortgage Rate	Mortgage Rate ^2	Mortgage ^3
Linear	1.25056E-14	0.0000
Quadratic	1.28738E-14	0.0822	0.0249
Cubic	4.17967E-14	0.1148	0.1286	0.1585
Log-log	2.91591E-18	0.0000
Logarithmic	4.91062E-14	0.0000
Exponential	4.50573E-19	0.0000