Write an equation of the line that passes through the point (3,-2) and is perpendicular to y=-1/2x+4

How do i do this? i don’t understand

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 25, a standard deviation of 2.5, and margin of error of 5%