How do you determine if 5x-7y=14 is a function?

2 answers:

6 0

You can type that function in a graphing calculator and either see the graph or the table. If you put that function in a table, then you have to make sure that x isn't repeating itself. If you look at the graph, then you have to do the vertical line test

Pavlova-9 [17]4 years ago

3 0

One way is to graph it and do the vertical line test
it is not a function if we can draw a vertical line in the graph that passes through 2 points of the graph

if we graph this function, we see there is no place we can draw a vertical line and hit the line twice

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Write the function in vertex form<br> y = -x2 - 8x - 7

GaryK [48]

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3 years ago

What is the interquartile range of the data? 24, 25, 27, 36, 37, 42, 42, 43, 49, 49, 50, 53, 59, 61, 65 41 7 17 10

AysviL [449]

<span>The interquartile range is the difference between the third quartile and the first quartile. First, find the median so you can separate the data in half. The median is the middle number. Arrange the numbers from least to greatest and find the number in the middle.

</span> $\sf 24, 25, 27, 36, 37, 42, 42, \boxed{\sf 43}, 49, 49, 50, 53, 59, 61, 65$

Find the medians of these two halves. These will be Quartile 1 and Quartile 3.

$\sf 24, 25, 27, \boxed{\sf 36}, 37, 42, 42$

Quartile 1 is 36

$\sf 49, 49, 50, \boxed{\sf 53}, 59, 61, 65$

Quartile 3 is 53

$\sf IQR=Q3-Q1=53-36=\boxed{\sf 17}$