David G. answered 08/06/19
Patient, Effective math/statistics tutor
The slope is indeed -5 but the line does not pass through (3, 6).
To check if a point (x, y) is on a line, substitute the values of x and y into the equation of the line and check for equality.
Here, x = 3, y = 6, and the equation is y = -5x + 7
We need to check if 6 = -5(3) + 7,
that is 6 = -15 + 7
that is 6 - -8
Since this is false, the point (3, 6) does not lie on the line y = -5x + 7