This is a vertical line. Therefore, the slope of it is undefined

Why?
We have the isosceles right triangle. The length of legs are 6. Use the Pythagorean theorem:

In general, the formula for calculating the hypotenuse in an isosceles right triangle is 
a - a leg, h - a hypotenuse
= -2
y= 2x+6. y= -2x-2
2x+6= -2x-2
+2x. +2x
____________
4x+6= -2
4x= -8
x=-2
Answer:
$28.77
Step-by-step explanation:
If the subtotal is $27.14, and the tax to add is 6%, the total would be:
$27.14*(1+0.06)=$28.77