Answer:
m = 2, c = - 1
Step-by-step explanation:
Using the point (1, 1), substitute x = 1, y = 1 into the equation
m + c = 1 → (1)
Using the point (2, 3), substitute x = 2, y = 3 into the equation
2m + c = 3 → (2)
Subtract (1) from (2) to eliminate c
(2m - m) + (c - c) = (3 - 1) ← simplify
m = 2
Substitute m = 2 into (1) for corresponding value of c
2 + c = 1 ( subtract 2 from both sides )
c = - 1
