Is the graph below proportional? Fir Tree Growth
40
32
24
Diameter (in.)
16
8
х
O
10 20 30 40 50
Time (yr)

yes because there is exactly one y value for every x value

for function there can't be more than one value for every x value

answer: yes, since the line has a steeper rate of change than the exponential the y-values will be greater and they will only intersect one time.