The graph below represents the number of vertical jumps an athlete can do over time. What is the constant of proportionality?1. 52. 153. 104. 25


Looking at the graph
we have a linear equation of the form
y=Kx ------> direct variation
where
K is the constant of proportionality
K=y/x
we need only one point to calculate the value of k
take the point (7,70)
K=70/7