When dealing with business analysis, when there is a graph of two linear equations, what is the point of intersection called?

What is the y-intercept of the line given by the equation

Consider that lines b and c are parallel. what is the value of x? what is the measure of the smaller angle?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%