Answer:
Mrs. Roth make a mistake with the signs of the numbers because the correct expression is K = -9M + 59
Explanation:
The equation will have the form:
K = aM + b
Where a is the difference that she calculated and b is the value of K when M is 0.
Taking into account the table a = -9 and b = 59. Then the equation will be
K = -9M + 59
So, Mrs. Roth make a mistake with the signs of the numbers because the correct expression is
K = -9M + 59
We can also proof that her equation is wrong replacing the value of M = 0 and comparing the value of K by the value in the table
K = 9M - 59
K = 9(0) - 59
K = 0 - 59
K = -59
Since -59 and 59 are distinct, Mrs. Roth's equation has a mistake.
