Well given these 2 pieces of information, we can easily obtain the equation for the line which would be the following :
Y = 5x - 1.
The 4 points including the y intercept:
(0,-1)
(1,4)
(2,9)
(3,14).
8d = -56
Divide both sies by 8:-
d = -56/8
d = -7 (answer)

Perimeter of a triangle = sum of measures of each side ;

