Ahorizontal line test is used to determine weather a function is

Mathwords: Horizontal Line Test. A test use to determine if a function is one-to-one. If a horizontal line intersects a function's graph more than once, then the function is not one-to-one. Note: The function y = f(x) is a function if it passes the vertical line test.

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A horizontal line test is used to determine if a function is one to one. If the line intersects a functions graph more than one then the function is not one to one.

Step-by-step explanation:

The function y=f(x) is a function if it passes the vertical line test.

y=−9/2x+10

step-by-step explanation:

let's solve for y.

0−9x−2y=−20

step 1: add 9x to both sides.

−9x−2y+9x=−20+9x

−2y=9x−20

step 2: divide both sides by -2.

−2y

−2

=

9x−20

−2

y=

−9

2

x+10

d

step-by-step explanation: