Which representations show a proportional relationship? PLEASE, HELP ME (I really don't know this part, please help me)

In the surface area formula for cylinders which expressionrepresents the lateral area

Which expression is equivalent to the expression shown?

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.