A cylinder is a solid figure with straight parallel sides and a circular or oval cross section with a radius (r) and a height (h). The volume of a cylinder is π r²h and the surface area is 2(π r²) + 2π rh.

The circumference of a circle is the distance around its perimeter and equals π (approx. 3.14159) x diameter: c = π d. The area of a circle is π x (radius)² : a = π r².

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.

-2b - 8x = -b + 6x + 9
-2b = -b + 6x + 9 + 8x
-2b + b = 6x + 9 + 8x
-b = 14x + 9
b = \( \frac{14x + 9}{-1} \)
b = \( \frac{14x}{-1} \) + \( \frac{9}{-1} \)
b = -14x - 9

The slope of this line is the change in y divided by the change in x. The endpoints of this line segment are at (-2, -4) and (2, 4) so the slope becomes: