Rational numbers

help me please

What is the least common multiple of 6 and 17?

What is x and y intercepts for y=x+7

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )