What is 11/18 - 1/6 in simplest form

Roger and natalie travel in similar cars. roger's car drives the two miles to school in 7.5 minutes. natalie drives the same distance in the opposite direction but in only 6.5 minutes. what is true of their velocities?

What is the rate of change of a line that passes through (2,-5) and (6,-2)?

Find the constant of variation for the relation and use it to write an equation for the statement. then solve the equation.