Answer:For the graph in the top-left corner, the ?? = 0.25This can be found using a simple slope equation:m = (y2-y1)/(x2-x1)m = slopeYou take two coordinates, in this case (8, 2) and (4, 1), label one as #1 and the other as #2, and plug in the values so:slope = (2-1)/(8-4)slope = 1/4 or 0.25The equation of a line is y = mx + b and if you were to place 0.25, or 1/4, in place of m (the slope) and 1 in the place of x since it is the x value, and multiply, you would end up with 0.25.This also gives you the answer to your next two questions.The one in the top-right corner is $0.25 per pencil.The answer to the question just below it is y = 0.25x.b in the equation would equal 0 since b is the y-intercept (where the line crosses the y-axis)As for the last one, you simply have to multiply 30 by each number in the left column since you already know 30 miles are travelled in 1 hour, giving you your rate or the equation of the line, y=x.The missing values of the table are as follows:0, 60, 150, 240, 330, 1470Finally, the last box:Miles = 30 * hoursy = 30x