Its timed so please be quick. thank you !

What is the definition of exponential decay?

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?

Find the number of real number solutions for the equation. x2 + 5x + 7 = 0 0 cannot be determined 1 2