Answer:
Yes it is, You can rearrange the expression to find that y is uniquely determined in terms of x, therefore a function.
Step-by-step explanation:
Quite a vague question, I used desmos to graph the attached photo.
The formula to convert degrees Fahrenheit to Celsius is:

Convert 59°F to degrees Celsius.
Add the number 59 in the formula, and solve.

Subtract 32 from 59.

Multiply 5 x 9 = 135, then divide 135/9 = 15.

Therefore 59 °F = 15 °C. The correct option is "D".
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Answer: D
Step-by-step explanation:
Try to draw the X and Y axis: When you shift the function to left it translates as going to the left of the X axis. So what you want is that every value of X on the parent function to correspond to the same x value minus four.
You can apply the same logic to get the + 6