(8,-1) m=4 Find Slope Intercept form

Which one ? is the answer and how to find this answer

Write the equation in logarithmic form e^x=403.429

20.ju inces. which ordered pair is a viable solution if x represents the number of books he orders and y represents the total weight of the books, in ounces? (-3,-18) (-0.5, -3) (0,0) (0.5, 3)