Find the equation of the line through the pair of points. Then write answer in slope intercept form

Question

(2,-5),(-1,4)

y=

Answer 1

Leslie,

You posted three of these.  Look at this one, then try the other two.

They are done the same way.

 

(2,-5),(-1,4)

Find slope:  m = (change in y)/(change in x) = (4-(-5))/(-1-2)= 9/-3 = -3

 

In slope intercept form of y = mx + b where m is slope and b is y-intercept

y = -3x + b

 

Use one of the given points as (x,y) to solve for b

4 = -3(-1) + b

4 = 3 + b

1 = b

 

Your equation is:  y = -3x + 1