Which of the following is the best definition for the word "proportion" an average combined value of numbers in a data set
an equation stating that two ratios are equivalent
a relationship between quantities
a number that describes the direction and steepness of a line
PLS HELP

#12 find the value of x. #13 find the value of the variable.

Ineed big ! the cost of a school banquet is $25 plus $15 for each person attending. create a table, sketch the graph, and write an equation in slope-intercept and point-slope form that gives total cost as a function of the number of people attending. what is the cost for 77 people?

Whit h equation best represents this situation the number 98 increased by an unknown number equal to 120