Identify the maximum value of the quadratic function given by the equation f(x)=-x^2+4x-1

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.

Which is the equation of a line perpendicular to the line with the equation 3x+4y=8

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way