Answer:
The first graph.
Step-by-step explanation:
To determine whether or not a line is a function or not, you can use something called the vertical line test. If it fails the vertical line test, then it is not a function.
0.7 is the decimal form of 7/10
There are 3600 seconds in 1 hour.
Multiply feet per second by 3600 to get feet in 1 hour:
150 x 3600 = 540,000 feet in 1 hour.
1 mile = 5280 feet.
Divide feet per hour by 5280 to get miles per hour:
540,000 / 5280 = 102.27 miles per hour.
Let z be any number (like x would be)
if we set z equal to 2x-6y, then we get z = 2x-6y
The system
2x-6y = 8
2x-6 = 3
turns into this new system
z = 8
z = 3
but z is a single number. It can't be both 8 and 3 at the same time. So there are no solutions
