What would be the answer to this question?

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

Joe has some money in his bank account he deposits 45$ write an expression that represents the amount of money in joe's account

List x1, x2, x3, x4 where xi is the left endpoint of the four equal intervals used to estimate the area under the curve of f(x) between x = 4 and x = 6. a 4, 4.5, 5, 5.5 b 4.5, 5, 5.5, 6 c 4.25, 4.75, 5.25, 5.75 d 4, 4.2, 5.4, 6