Lynn Byrd, Greg Byrd and, Chris Pearce Solutions for Chapter: Graphs, Exercise 2: Exercise 11.1

$x \text{and} y$ are two variables and are connected by the function $y=x-5$. Give three examples of what $x \text{and} y$ could represent.

A litre of petrol costs $\mathrm{US}\$150$. If the cost of $10$ litres of petrol is $\mathrm{US}\$k$, find the value of $k.$

A litre of petrol costs $\mathrm{US}\$150$. Write down a function to show the cost($y$ dollars) of $x$ litres of petrol.

You can exchange $10$ euro for $210$ peso. How many pesos will you get in exchange for $1$ euro?

You can exchange $10$ euro for $210$ peso. Write down a function to show the relationship between $y$ pesos and $x$ euros.

The relationship between US dollars$\left(x\right)$ and Libyan dinars$\left(y\right)$ is $y=1.5x$. Describe this relationship in words.

The relationship between US dollars$\left(x\right)$ and Libyan dinars$\left(y\right)$ is $y=1.5x$. Explain how you would calculate the value of $\mathrm{US}\$570$ in dinars.

The relationship between US dollars$\left(x\right)$ and Libyan dinars$\left(y\right)$ is $y=1.5x$. Explain how you would calculate the value of $570$ dinars in US dollars.