Answer:
(6, 20) (8, 42)
Find the gradient:
(6 = x1, 20 = y1)
(8 = x2, 42 = y2)
Formula = m = y2 - y1 divided by x2 - x1
m = 42 - 20 divided by 8-6
m = 22/2
m = 11/1 which is the same as 11
Find the y-intercept:
Then, take one of the coordinates above. In this case, I'll take (6, 20).
Then we replace y and x from the coordinates.
- 20 = 11(6) + c
- 66 + c = 20
- c = 20 - 66
- c = -46
y = 11x - 46