The equation below describes a proportional relationship between x and y. What is the constant of proportionality? y=5/8x

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.

If the line in the graph is shifted up two units which is the equation of the new line

Rose and andrew are financing $128,000 to purchase a condominium. they obtained a 15-year, fixed-rate loan with a rate of 5.05%. they have been given the option of purchasing up to four points to lower their rate to 4.81%. how much will the four points cost them?