I'm sorry, I hope this helped.
You must first attach the problems with your question.
Answer:
3/4
Step-by-step explanation:
You can calculate slope with 
2 points from the graph are (0,-1) and (4,2)
plugging the points in would give you

Please rate me as brainliest if this helped!
Answer:
3. 14 cm
Step-by-step explanation:
Solve for radius first using the equation for circumference:
C = 2πr
44 = 2πr
44/2π = r
r = about 7 cm
d = 2r
d = 2*7
= 14 cm