Brainliest to anyone who can answer and show working out :)

Complete the standard form of the equation that represents the quadratic relationship displayed above, where a, b, and c are rational numbers.

In the 30-60-90 triangle below side s has a length of and side r has a length

Lindsay used two points, (x,y; ) and (+2.82), to find the equation of the line, y = mx + b, that passes through the points. y2-y, first, she used the definition of slope and determined that the value of mis x, - . given this information, which expression must represent the value of b?