Please help if you know the answer please

Find the slope of the line below . enter your answer as a fraction or decimal. use a slash mark ( / ) as the fraction bar if necessary

What is the probably of getting heads when poing a coin and getting a number greater than or equal to 5 when rolling a single diea) 1/6b) 1/3c) 1/4d) 1/12

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18