Problem 1 Explain what the slope and intercept mean in each situation.
a. A graph represents the perimeter, y, in units, for an equilateral triangle with side length a units. The slope of the line is 3 and the y-intercept is 0.
b. The amount of money, y, in a cash box after tickets are purchased for carnival games. The slope of the line is 1/4 the y-intercept is 8.
c. The number of chapters read, y, after x days. The slope of the line is 5/4 the y-intercept is 2.
d. The graph shows the cost in dollars, y, of a muffin delivery and the number of muffins, x, ordered. The slope of the line is 2 and the y-intercept is 3.​