create an equation for a third function that has a greater rate of change than one function but a smaller rate of change than the other function / please help!

Which expressions are equivalent to -6 + 3m

Find the value of the variable and the length of each secant segment.

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?