What is .01% of $7800

Find the slope of the line that contains the following points. r(-2, 4), s(6, -2)

Find dy/dx using implicit differentiation ln(20+e^xy)=y

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?