Ok so to write the equation of the line you will need the slope and y-intercept. Since we are given two-point we can easily find the slope by using this equation for slope formula:

$\frac{y_{2}-y_{1} }{x_{2}-x_{1} }$

So now that we have our equation we can just plug in the numbers:

$\frac{(-9)-(-9)}{5-(-3)}$

After subtracting you should get:

0/8

Since zero is in the numerator and you can't divide zero by anything, the slope is 0. We still need the y-intercept for the equation however since the slope is 0 there is no need to put anything else.

Then to find the y-intercept all you have to do is plug in one of the coordinatines into the slope equation to solve, for example, using the point (5,-9):

$(-9) = 5(0) + b$

B is the variable for the y-intercept. Also notice how I put 0 as our slope into the equation. Now all you have to do is solve for b. Which you would get b = -9. Since you have your slope and your y-intercept now you just write out your equatoin for the line which is:

y = 0x - 9

**Just write it as

y = -9

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2 years ago

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Adult tickets for the school musical sold for $3.50 and students tickets sold for $2.50. 321 tickets were sold altogether for $9

Licemer1 [7]

186 student tickests were sold and 135 adult tickets were sold

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2 years ago