To find the slope of a function written in point-slope form, we must first know what point slope form is. Point slope form is:
y - y₁ = m[x - x₁]
In this function, m is the slope, so the find the slope of a point-slope line function, we just have to look at the value right outside the parenthesis on the right side of the equation.
For this case we have the following expression:

We eliminate the parentheses taking into account that:

We add similar terms:

Different signs are subtracted and the sign of the major is placed:

Finally, the expression is reduced to:

Answer:

Option B
Since none of the options make sense with 23, I assume it was a typo, and you meant 2/3.
Let l,w and h be the length, width and height of the original prism, and l',w' and h' be the length, width and height of the new prism. We are given

Also, if we call V the original volume, and V' the volume of the new prism, we have

Substitute the expressions for l', h' and w' in the formula for V':

150 miles per hour (pretty slow for a plane so I hope that's correct)
Answer:
Option 3
Step-by-step explanation:
The two triangles are proved congruent to each other so CPCTC proves that the angles are also congruent.