Could anyone give me some help with Q1.b

Q1. Find the equation of the straight line through the points A(-1,5) B(3,1)

it works out to be y+x=4

b. Find the size of the angle which Ab makes with the positive direction of the x- axis

m = tan(X)

m = -1

How would I work it out?

## Winter Diet 2002 non calc Question help

### xpurple_starsx

Posted 18 May 2004 - 07:42 PM

At 1 you should know that tan is 45 degrees.

Since you want to know when m=-1 you should do 180-45 (since the x-axis is a straight line with an angle of 180) which gives you an angle of 135 degrees as the answer.

Since you want to know when m=-1 you should do 180-45 (since the x-axis is a straight line with an angle of 180) which gives you an angle of 135 degrees as the answer.