Based on the graph shown below, the equation of line P is y = 3x + 1.
In Mathematics and Geometry, the point-slope form of a straight line can be calculated by using the following mathematical equation (formula):

Where:
- x and y represent the data points.
- m represent the slope.
First of all, we would determine the slope of the downward sloping line by using these points (3, 2) and (0, -7);

Slope (m) = (-7 - 2)/(0 - 3)
Slope (m) = -9/-3
Slope (m) = 3
Since the lines are parallel, they must have the same slope.
At data point (2, 7) and a slope of 3, an equation for this line can be calculated by using the point-slope form as follows:
y - 7 = 3(x - 2)
y = 3x - 6 + 7
y = 3x + 1
Complete Question:
What is the equation of line P?
Give your answer in the form y = mx + c, where m and c are integers or fractions in their simplest forms.