The cost depend on the number pencils, so the cost is the y and # of pencils is the x
Same as for question 7
To graph, the length depend on the time, so length is y, time is x
6. Linear
7. Not
Given the following question:

Graph the function:
The value of the function of x is infinite as you see the line goes on forever. Which means your answer is option C or "10,000."
The solution is the point where the lines cross. So (-1, -2)
Answer:
0,∞
Thus, the range of the square root function is [0,∞)
Step-by-step explanation:
When its domain is greater than or equal to zero, its inverse is the squaring function. When its domain is all real numbers, its range includes complex numbers such as i, -1.