The function f(x)=-0.25x+5 models the height of a candle x seconds after it is lit. What is the meaning of the slope of the function?

The diagram shows a 7cm by 6cm rectangle based pyramid. all the diagonal sides - ta, tb, tc and td are length 10cm. m is midpoint of rectangular base. work out height mt to 1 decimal place

This is so hard and it’s for a test

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !