Um your picture wont show do it again
Answer:

Step-by-step explanation:
The point-slope form of a line is given by:

Where
(x_1,y_1) is the coordinate pair (any of the points given)
m is the slope. The ratio of change in y coordinates by x coordinates
Let's calculate the slope:

Now, it is given "y - 4", so y_1 is 4, so they are using the coordinate pair (7,4). So we can say x_1 = 7
Now we have all the values, lets write the equation:

This is the point-slope form.
Answer:
A = bh thus: A=671.34 mm²
Step-by-step explanation:
Area =b* (base) h (Height)
Your answer would be 10.6
You'd first have to find out what percentage of people would be 30 out of 100%