45.1k views
4 votes
​​​​​​​

Find the value of t given that the line joining (-1,-3) and (1, t) is perpendicular to a line with gradient 2.

1 Answer

4 votes

Final answer:

The value of t for the line joining points (-1,-3) and (1, t) that is perpendicular to a line with gradient 2 is -4.

Step-by-step explanation:

To find the value of t given that the line joining the points (-1,-3) and (1, t) is perpendicular to a line with gradient 2, we must use the concept that the gradients of perpendicular lines are negative reciprocals of each other. Since the given line has a gradient of 2, the line joining (-1,-3) and (1, t) must have a gradient of -1/2.

We can use the formula for the gradient of a line (m) which is given by:

m = (y2 - y1)/(x2 - x1)

Substituting the values of the coordinates into the formula, we get:

-1/2 = (t - (-3))/(1 - (-1))

Now we solve for t:

-1/2 = (t + 3)/2

-1 = t + 3

Therefore, t = -4.

User Bad Dobby
by
7.9k points

No related questions found

Welcome to QAmmunity.org, where you can ask questions and receive answers from other members of our community.

9.4m questions

12.2m answers

Categories