If 3 apples cost 9$, how much does one cost? Using the above example, can you determine if we can draw a line graph?

Question

If 3 apples cost 9$, how much does one cost?

That is an example of a simple word problem. But we already know the answer without thinking of the word 'algebra'. This is how our mind comes up with the answer.

We start by assuming x is the price per apple. 3x is the price for 3 apples. Now we already know that 3 apples cost 9$. So 3x = 9, now divide both sides by 3. x=3$ per apple.

Using the above example, can you determine if we can draw a line graph?

Answer 1

Yes Shekita you can draw a graph any time you have an independent variable and a variable that depends on it. In this case it is a straight line with a slop m=3 and x and y intercept at the origin (0,0). y=3x.