What is the equation of the circle in general form

Hello i need some with trigonometric substitutions. [tex]\int\limits^a_b {x} \, dx[/tex]

When drawing a trend line for a series of data on a scatter plot, which of the following is true? a. there should be an equal number of data points on either side of the trend line. b. all the data points should lie on one side of the trend line. c. the trend line should not intersect any data point on the plot. d. the trend line must connect each data point on the plot.

The square pyramid has a volume of 441 cubic inches. what is the value of x? 1/7x is the height x is the base