Consider the line y = 2x–4. What is the slope of a line parallel to this line?
What is the slope of a line perpendicular to this line?

Parallel slope = 2

This is because the original line has slope 2. Parallel lines have equal slopes.

Perpendicular slope = -1/2

The original slope 2 or 2/1 turns into -1/2 after flipping the fraction and the sign. Note the original slope and perpendicular slope multiply to -1. This is true for any pair of perpendicular lines where neither line is vertical.

homozygous. one is homozygous, while two is heterozygous.

step-by-step explanation:

because 1/3 is a fraction. we can tell because there is a divisor symbol between the 1 and the 3. if we were to add 2 fractions together, we would add the numerators, which is the number on top, but not the denominators, which is the number on the bottom

1/3+1/3=2/3

hope this !