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