Don't understand please help

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Given f(x)= 9x+1 and g(x)=x^3, choose the expression (f*g)(x)

Question: a) does the given set of points represent a linear function? how do you know? b) assume that the point (-2,4) lies on the graph of a line. what y-values could complete this set of ordered pairs that lie on the same line: (- (hint: there are several correct answ