Question

3) Given the points (6-11) and (-2,9), find the following: a) find the slope between these points, b) find the equation of the line between these points, b) find the y-intercept of this line, c) graph this line.

Answer 1

Points (6,-11) and (-2,9)

then

a) Slope m= Y/X = (9 --11)/ (-2-6) = 20/-8= -5/2

b) equation of line y = mx + b

find b= y - mx = 9 -(-5/2)•(-2) = 9 - 5= 4

then equation is

y= (-5/2)x + 4

c) y-intercept of this line is

x= 0 , y= 4

d) graph of this line