Rhombus, rectangles and squares help

Use set builder notation to represent the following set: { -3, -2, -1, 0}

Which is the graph of f(x) = (4)x? image for option 1 image for option 2 image for option 3 image for option 4

One month, a music site observed that 60% of the people who downloaded songs from its site downloaded q sam's latest single. the equation below represents this information, where x represents the total number of people who ddownloaded songs from the site that month: x = 0.6x + 384 how many people who downloaded songs from the site that month downloaded q sam's latest single?