If the point (1,5) lies on a circle whose center is at the origin, what is the equation of the circle?

Is the orthocenter of a triangle on the inside ?

Which term best describes the association between variables a and b? no association a negative linear association a positive linear association a nonlinear association a scatterplot with an x axis labeled, variable a from zero to ten in increments of two and the y axis labeled, variable b from zero to one hundred forty in increments of twenty with fifteen points in a positive trend.

This question awards 100 ! i really don’t want to fail i will also mark you !