100 points and brainliest. what’s deshawn’s mistake? what’s the correct answer?

a test to see if it is a function is a vertical line test, if you draw a straight line and the line intersects at 2 points, it is not a function.

in this case, (-2,-2) is an open hole, which means the value where it is placed is just around that value so not exact.

the vertical line test would work if it was a closed hole, and one or both points (-2,3) and (-2,-2) would have to be removed.

the mistake that deshawn made was that he mixed up the vertical line test with horizontal instead and has deduced that since a horizontal line has intercepted both points, they must be removed.

this graph is, in fact, a function since the open hole is not exactly under (-2,3)

A) the graph is a function

Step-by-step explanation:

I have answered this for reassurance. The person above me said all the things I was going to say. It would be pointless to re-say everything the person above me just said.

first, we define the variables:

x: number of years after 1950

f (x): amount of vinyl sold.

then, with the variables defined, we have:

68594 vinyl records were sold in 1958 > f (8) = 68594

91299 vinyl records were sold in 1961 > f (11) = 91299

38720 vinyl records were sold in 1952 > f (2) = 38720

161743 vinyl records were sold in 1967 > f (17) = 161743

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step-by-step explanation:

5+2x=a

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