Explain how -3^4 and (-3)^4 are similar?

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?

Could someone with number 1 and 2

What is x and y intercepts for y=x+7