Math . investigate the weather forecast in your city.
record the high and low temperatures that are forecast for the next 7 days in the table below. in the columns titled, difference," record the change in temperature from the day before. to do this, subtract the previous temperature from the current temperature. be sure to use positive and negative numbers as needed! for example, if yesterday’s temperature was 70 and today’s temperature was 65, the difference is 65 – 70 = -5.
here's an example:

This is easy all you have to do is fill in the chart on the pdf. here I did it but you have to fill it in on your own. So just go from left to right starting at the top and fill it in, all except the dates which I didn't do.Hope this helped :)
 Date,    High, Temperature Subtract current temperature minus previous temperature,Difference,    Low Temperature,    Subtract current temperature minus previous temperature,    Difference,        93,    -N/A-,    -N/A- ,  87,    -N/A-,    -N/A-,        90 ,  93-90=,      -3 ,  79,      79-87,      -8 ,    93,      93-90,      3,      81 ,  81-79,      2 ,    91 ,  91-93,      -2 ,  81 ,  81-81,      0,        91,      91-91,      0,      79,      79-81,      -2,        95,      95-91,      4 ,  79 ,  79-79,      0 ,    95,      95-95,      0,      79,      79-79,      0.