f( - 4) = 0 ⇒ x(1) = - 4 and y( 1) = 0
f ( 0 ) = 2 ⇒ x( 2 ) = 0 and y(2) =2
m = ( ( y(2) - y(1))/((x(2) - x(1))
m = ( 2 - 0 )/( 0 - (- 4))
m = 2/4
m = 1/2
y - y(1) = m(( x - x(1))
y - 0 = m(( x - (- 4))
y = (1/2) * ( x + 4)
y = (1/2)*x + 2
Y = x/2 + 2