Astudent is saving money to buy a microscope. the student currently has $50 and plans to save $15 every month. write a function that represents the amount y (in dollars) of money that the student saves after x months.

Step-by-step explanation:

The student currently has $50 and plans to save $15 every month.

Let x represent the number of months that the student will save enough money to buy the microscope.

Let y represent the amount that the student saves after x months.

The function that represents the amount y (in dollars) of money that the student saves after x months will be

y = 50 + 15x

The 50 remains constant because she has already saved it

4.50 per walk
At least 50
we can write an equation to solve for how many walks, w,
4.50w = 50
divide both sides by 4.50 
w = 11.111...

That is, he will have to walk about 12 times to earn at least $50 when charging $4.50 for a walk with the dogs. 

Hope this helps :)