Help!! And please show me the equations being used, it'll help! :)

The Tanner Company has gathered the following Information about shipping costs. Based on the data, answer the following questions Prepare a scattergraph of units shipped vs, shipping costs (attach a copy of the scattergraph) Does there seem to be a strong relationship between them ? Using the high-low method estimate a cost function for shipping costs (e.g. estimate a and b for a Y = a + bx Using least squares regression, do the same thing (attach a copy of your regression output). How strong is the relationship between units shipped and shipping costs? How can you tell? What would you predict shipping costs to be in a month when 135,000 units are shipped