The equation of a line with slope(m) that passes through two points (x₁,y₁) and (x₂,y₂) in Point-Slope is given by:

Where the slope, m is:

From the graph, the coordinates of the yellow points are (0,5) and (6,9).
Substitute (x₁,y₁)=(0,5) and (x₂,y₂)=(6,9) into the slope formula:

Hence, the slope is 2/3.
Substitute m=2/3 and (x₁,y₁)=(0,5) into t

Hence, the slope is 2/3.
Substitute m=2/3 and (x₁,y₁)=(0,5) into t

Hence, the slope is 2/3.
Substitute m=2/3 and (x₁,y₁)=(0,5) into t