Mary's salary is $X per annum. The tax system is such that Mary pays a 15% flat rate of income tax on her salary. The tax system is due for reform, and politicians have suggested the following: Any income under $7,500 should be tax free.
Any income above $7,500 should be taxed at 25% on the amount over $7,500.
Given that Mary will be paying exactly the same amount of tax under both systems, calculate the amount of tax that Mary pays. Give your answer in dollars and cents to the nearest cent. Do not include commas or the dollar symbol in your answer.

options a,b,c are the right answer.

step-by-step explanation:

a linear parent function is always represented as y = x

if we write this function in the form of y=mx+c

⇒

or  

now if we plot a graph we will find these characteristics:

1) y intercept of the graph is zero so its a straight line passing through origin.

2) as we can see in both the forms of function written, values of x and y may be either positive or negative for the positive slope means points on the graph are either in first quadrant or in third one.

3) it's slope is one.

cheater

step-by-step explanation:

6 cm

step-by-step explanation: