The slope of the radius is 2
The slope of the tangent line is -1/2
How to find the slope of the tangent line
The slope is represented as m, the slope by definition is the ratio change of the output values to the input values
Slope of the radius
Slope, m is calculated using the points on the graph (5, 2) and (6, 4)
m = (y₀ - y₁) / (x₀ - x₁)
plugging in the values
m = (2 - 4) / (5 - 6)
m = (-2) / (-1)
m = 2
Slope of the tangent line
Points on the graph (7, 6) and (13, 3)
m = (y₀ - y₁) / (x₀ - x₁)
plugging in the values
m = (6 - 3) / (7 - 13)
m = (3) / (-6)
m = -1/2