Answer:
D
Step-by-step explanation:
We can use the "vertical line test" to determine whether a given graph represents a function or not.
If your vertical line intersects the graph in more than one place, the graph does NOT represent a function. Thus, D does not represent a function, as a line drawn vertically thru this graph intersects the graph multiple times.
Graph A: Note that if you draw a vertical line thru x = -2, your line will intersect the BLACK dot (-1 3/4, 0) and the EMPTY circle (-1 3/4, 3 1/4). This is OK; this graph represents a function.
B. 148 miles
C. 192 miles
D. 196 miles
x = 2y
3x - 6y = 10
========================================
Work Shown:
3x-6y = 10
3(2y)-6y = 10 ... plug in x = 2y
6y-6y = 10
0 = 10
We get a false statement at the end.
This means the system is inconsistent with no solutions.
Graphing each equation produces two parallel lines that never intersect.
B) Ever week for 5 weeks, deposit $20 on Monday, Wednesday, and Friday, and withdraw $27.50 on Tuesday and Thursday.
C) Ever week for 10 weeks, deposit $10 on Monday, Wednesday, and Friday, and withdraw $27.50 on Tuesday and Thursday.
D) Ever week for 10 weeks, deposit $20 on Monday, Wednesday, and Friday, and withdraw $27.50 on Tuesday and Thursday.