The Table Shown Was Generated by a Graphing Calculator $y_{1}$ And Y2 Are Linear

Multiple Choice

The table shown was generated by a graphing calculator. The functions defined by $y_{1}$ and y2 are linear. Based on the table, find the equation for $\mathrm{y} 1$ .

A) $y_{1}=-x+9$
B) $y_{1}=2 x+9$
C) $y_{1}=-x+3$
D) $\mathrm{y}_{1}=2 \mathrm{x}+3$