What is a constant of proportionality

Someone this asap for a group of students attends a basketball game. * the group buys x hot dogs at the concession stand for $2 each. * the group buys y drinks at the concession stand for $3 each. the group buys 29 items at the concession stand for a total of $70. how many hot dogs did the group buy?

Aline has a slope of and a y-intercept of –2. what is the x-intercept of the line?

What is the measure of angle tvu shown in the diagram below