The Solution Set of the System $y _ { 1 } = 2 x + 3$

Multiple Choice

The solution set of the system $y _ { 1 } = 2 x + 3$ and $y _ { 2 } = - x + 9$ is $\{ ( 2,7 ) \}$ . Using slopes and $y$ -intercepts, determine which of the two calculator-generated screens, left or right, is the appropriate one for this system.

A) Right
B) Left
C) Neither is correct.
D) Both could be correct.