please help me 8th grade math

Answer:
y=1/2x+6
Step-by-step explanation:
for the equation you start with finding the rate of change (wich is what y changes by as x 9minths) in creases by 1) and then add the Y-intercept, so it would be Y=1/2x+6
Formula:
Y=△y•x+b(y-int)
To find y intercept find what y is when x is 0, or in this case you know it comes out 6 feet tall, so that is what the Y int. is