Can you help me please ​

The graph shows the rate at which paint is used to paint a wall.enter values to complete each statement below based on the graph.when 1 gallon of paint has been used, ( # ) square feet of the wall will be painted.the unit rate is ( # )square feet per gallon.

When turned about its axis of rotation, which shape could have created this three-dimensional object?

Which expression is equivalent to 8(k + m) − 15(2k + 5m)?