Question

For the straight line defined by the points (2, 55) and (4, 91), determine the slope and y-intercept. do not round the answers.

Answer 1

 

Hello : let  A(2,55)    B(4,91)
the slope is :   (YB - YA)/(XB -XA)
(91-55)/(4-2)  = 36/2 =18
an equation is : y-55 = 18(x-2)

 y-intercept when : x = 0  :  y - 55 = 18(0-2)
y-55 = -36
y = 55-36 = 19