Answer :
Hello! To calculate the slope we have to use the formula below:
[tex]slope=\frac{y_2-y_1}{x_2-x_1}[/tex]Considering (x1, y1) = (-6, 6) and (x2, y2) = (5, 6), we have to replace it in the formula:
[tex]slope=\frac{6-6_{}}{5_{}-(-6)_{}}=\frac{0}{5+6}=\frac{0}{11}=0[/tex]As the slope is 0, the line will not vary (will keep constant).