What is the equation if the slope is -7 and the y intercept is 4

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?

In what organelle does photosynthesis take place?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1