Answer:
Here is a graph I created.
For Miguel to spend the least amount of money, he would have to buy 2 gallons for $5.98 and two 1/2 gallons for $4.20. The total is $10.18.
I'm stuck on the next question though.
10 17/18 is the answer so it’s C
Answer: -5 • (r - 1)
Step-by-step explanation:
We have been given an equation
. We are asked to find constant of proportionality from our given equation.
We know that two directly proportional equations are in form
,where y is directly proportional to x and k is constant of proportionality.
Let us rewrite our given equation by cross multiplying as:
![2y=9x](https://tex.z-dn.net/?f=2y%3D9x)
Now we will divide both sides of equation by 2.
![\frac{2y}{2}=\frac{9x}{2}](https://tex.z-dn.net/?f=%5Cfrac%7B2y%7D%7B2%7D%3D%5Cfrac%7B9x%7D%7B2%7D)
![y=\frac{9}{2}x](https://tex.z-dn.net/?f=y%3D%5Cfrac%7B9%7D%7B2%7Dx)
We can see that our equation is in form
and constant of proportionality is
.