For every dollars Ken earns mowing lawns, he gives dollars to his younger brother, Tim, who helps him. Which of the following gives the relationship between , the number of dollars Ken earns, and , the number of dollars he gives to Tim?
Yet another reading and understanding question.
We don’t need to do any calculations – just write down an equation.
We have two brothers (Ken and Tim). They earn d dollars mowing the lawn.
For every 10 dollars they earn Tim gets 3 . If Tim got T dollars how can we calculate d?
Well, if Tim got 3 dollars d must be $10. if Tim got 6, d must be $20 and so on.
That means we need to divide the t dollars tim gets by 3 and multiply it by 10 to obtain the d dollars they earned all together.
Answer b should do the trick.
Another way is to plug in 6 as the number of dollars tim earns and see that we get 20 as the d dollars they earn together.