So it looks like you're getting all of your output (although the sample in your assignment showed two lines of headings and your output only shows one). It looks like your code to convert Centigrade to Fahrenheit is working correctly. So, what problem do you have left besides centering your output values under the appropriate headings? (You do realize that since the output values you've calculated vary from one to four characters, you will need to vary the number of spaces or tabs printed in front of the calculated values to center them, don't you?) I assume that you don't have access to the tabs utility yet, so you're probably better off just using spaces in your output rather than tabs. (And even if you do have access to the tabs utility, I wouldn't recommend using it for something like this.)

Do you know how to get bash to tell you how many characters are stored in a variable? Do you know what output column is at the center of each of your headings? With these two pieces of information, can you calculate how many leading spaces or tabs you need to print before the Centigrade value? (I'm not asking if you can do these calculations using bash; I'm asking if you understand the arithmetic required to determine how to center the strings you'll be printing.)

Do you know how to do integer arithmetic operations inside bash (without invoking bc or expr) yet? If not, it isn't a big deal, you have shown that you can use bc to perform any calculations you need to perform; it is just easier to use the bash built-in arithmetic evaluation tools. Do you know how to use a for loop in bash? Do you know how to use echo to output some characters without a trailing newline?

PS When posting code and sample input and output, please don't do anything special with the fonts. Using arial (a variable width font) instead of the default constant width font will make it almost impossible to get things lined up here.