b×h=a
this is how to represent it and it is a direct variation.
Answer:

Step-by-step explanation:
Make both equations equal to each other and solve for the variable x:

Find two numbers that when you add them you get -3 and the product of both numbers be -4. These numbers are 1 and -4. Then:

Substitute these values into one the original equations and solve for y:

Therefore, you get that:

Answer:
y=-15x+50
Step-by-step explanation:
You originally had 50 dollars, so +50. Then, it decreases at a rate of 15 every week, so -15x.
Y is the total number of money she has.
y= -15x+50