If (24, 6) and (40, 10) belong to a proportional relationship, what is the constant of proportionality? a 1.5
b 0.04
c 2.5
d 0.25

Which expression can be used to determine the slope of the line that passes through the points -6, three and one, -9

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Fanny mendelssohn manages all the magazines and paperback books at a local grocery store. she prices many paperbacks to sell at $7.99. the cost to the store is $5.29. what is the markup rate on a paperback book, based on its cost?