What does taking the square root of a number do? (two answers)

The graph below represents the number of dolphins in a dolphin sanctuary. select all the key features of this function.

Solve 3x-18=2y and 5x-6y=6 by elimination show work

Which statements are true? check all that apply. the line x = 0 is perpendicular to the line y = –3. all lines that are parallel to the y-axis are vertical lines. all lines that are perpendicular to the x-axis have a slope of 0. the equation of the line parallel to the x-axis that passes through the point (2, –6) is x = 2. the equation of the line perpendicular to the y-axis that passes through the point (–5, 1) is y = 1.