Whats the constant proportionality fro y=2/3x

Given the equation f(x)=a(b)x where the initial value is 40 and the growth rate is 20% what is f(4)

Need an artist designed a badge for a school club. figure abcd on the coordinate grid below shows the shape of the badge: the badge is enlarged and plotted on the coordinate grid as figure jklm with point j located at (2, -2) and point m is located at (5, 4). which of these could be the coordinates for point l? a. (2, 4) b. (8, 4) c. (5, 1) d. (5, 7)

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?