Wire an equation of the line which passes through the origin and contains (10,2) in standard form

This is different from the first one can someone me

An initial investment of $100 is now valued at $150. the annual interest rate is 5%, compounded continuously. the equation 100e0.05t = 150 represents the situation, where t is the number of years the money has been invested. about how long has the money been invested? use your calculator and round to the nearest whole number. years

You deposit $5000 each year into an account earning 3% interest compounded annually. how much will you have in the account in 30 years?