Can someone solve, explain and show their work? i don't understand why my answers are wrong.

Multiply 14 (the price of gas in 2000) by 19.9% (the price as a percentage of the 2000 price). 14 times 0.199 is 2.786. Therefore, it would cost $2.79 to fill the same gas tank in 1960.

Not 100% sure if this answer is correct, but this is what I got.

for this case we have by definition, if two lines are perpendicular, then the product of their slopes is -1.

then, given the following line:

so,

we are looking for m_ {2}:

then, the line is given by:

we find "b" replacing the given point:

finally, the equation is:

option c