Question

1. giaelle pays $240 in advance on her account at the athletic club. each time she uses the club, $15 is deducted from her account as shown by the graph below. use the graph to identify the y-intercept and interpret its meaning. a. 240, the initial balance of her account b. 15, the amount deducted from her account after each visit c. 8, the number of visits she can make to the club d. 120, the balance of her account after 8 visits 17. which of these points does not lie on the graph of y = -3x - 4? a. (0, -4) b. (1, -1) c. (-1, -1) d. (-2, 2)

Explanation:

Step1: Find y-intercept of graph

The y-intercept is where number of visits (x)=0. From graph, y=240 at x=0.

Step2: Interpret y-intercept

x=0 means no visits yet, so 240 is initial account balance.

Step3: Check point (1,-1) in y=-3x-4

Substitute x=1: y=-3(1)-4=-7≠-1, so it doesn't lie on the graph.

Answer:

1. A. 240; the initial balance of her account
2. B. (1,-1)