

<u>If two lines are perpendicular to each other, their slopes</u>
<u>are negative inverses of each other.</u>
Thus,

. See how this works?
We took 4, then took its opposite, and flopped that over

Definition-:
Perpendicular lines are lines that intercept each other at a 90 deg. angle, which is usually called the right angle.
Answer:
Step-by-step explanation:
Answer:
<h2>
y = 3.5x + 15</h2>
Step-by-step explanation:
Number of months is x, and number of pairs of shoes after each month is y.
7 new pairs of shoes every 2 months means that after each month:
y = 7/2 x
We need to add the 15 pairs from start.
y = 3.5x + 15