The equation of the line of best fit is y = 25x + 7.5. what does the y-intercept represent?

When ∆rst is translated 4 units down, what are the apparent coordinates of t’? give 15 points

Hurrya vegetable garden and a surrounding path are shaped like a square that together are 11ft wide. the path is 2ft wide if one bag of gravel covers 9 square feet how many bags are needed to cover the path

The anwser cause i do not understand just plez