Question

a dance school offers classes in ballet folklórico. there is a one - time registration fee and an additional charge for each class. the total cost of classes, y, is a linear function of the number of classes taken, x. three classes cost $36. seven classes cost $68.
points on the graph: (3, 36) and (7, 68)
rate of change: 8
substitute (7, 68) in the equation.
$y = 8x + b$
$? = 8(?) + b$

Explanation:

Step1: Identify the point coordinates

The point is \((7, 68)\), so \(x = 7\) and \(y = 68\).

Step2: Substitute into the equation

Substitute \(y = 68\) and \(x = 7\) into \(y = 8x + b\).
So we get \(68 = 8(7) + b\).

Answer:

\(68 = 8(7) + b\) (The first "?" is 68, the second "?" is 7)