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This table gives a few (x, y) pairs of a line in the coordinate plane.
x y
22 36
27 54
32 72

What is the x-intercept of the line?

Respuesta :

Answer:

(12,0)

Step-by-step explanation:

Let us find the equation of the line with the help of two point form of a line

Here take any two coordinates

say (22,36) and (27,54)

The two point form says

[tex]\frac{y-y_{1}}{x-x_{1}}=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}[/tex]

Putting the values in above formula

[tex]\frac{y-36}{x-22}=\frac{54-36}{27-22}[/tex]

[tex]\frac{y-36}{x-22}=\frac{18}{5}[/tex]

[tex]y-36=\frac{18}{5} \times (x-22)[/tex]

[tex]y=\frac{18}{5} \times (x-22) + 36[/tex]

In order to determine the x intercept we put y = 0 and solve it for x

[tex]0-36=\frac{18}{5} \times (x-22)[/tex]

[tex]-36 \times \frac{5}{18}=(x-22)[/tex]

[tex]-10=x-22[/tex]

adding 22 on both sides we get

x=12

Hence the x intercept is 12