If a function can be written in y = mx + b form, it is linear.
The function given:

Taking "5" to the right hand side, we get:

This is in the form y = mx + b, with m = 5 and b = 5.
This is a linear function.
Answer:
63.3 square feet
Step-by-step explanation:
Let a = 20 ft, B = 15 ft, c = 9ft

Answer:
a
Step-by-step explanation:
its 8 bc when u put it under 9 it repeats
Answer: i think its 4 if my calculations are right
Step-by-step explanation:
Answer:
Not proportional.
A winter, B is spring, C is summer and D is fall.
Step-by-step explanation:
A proportional relationship has a constant of proportional which can be formed by a ratio between any y and x values of the function. The constant will be the same every time.
The ratio y/x is 25/1, 40/2, 55/3, 70/4, and 85/5. These simplify to 25, 20, 13.33, etc. These are not the same values. This is not proportional.
In the attached graph the lows or "valleys" are the coldest parts of the year. A and D are likely Fall and Winter. While B grows and temperatures get higher then B is likely Spring. This means C is summer since it has the highest temperatures.