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andreyandreev [35.5K]
3 years ago
6

12)Write an equation for a line in slope-intercept form passes through (3, 3) and (-6,-3).

Mathematics
1 answer:
yuradex [85]3 years ago
8 0

Answer:

The equation is y = 2/3x + 1.

Step-by-step explanation:

To write a slope-intercept form equation for this problem, first you need to write the formula for the slope of a line.

The slope formula is rise/run.

The rise from (3,3) to (-6,-3) is -6.

The run from (3,3) to (-6,-3) is -9.

That makes the slope -6/-9, which is simplified to 2/3.

So the simplified slope is 2/3.

To find the y-intercept, locate it by using the slope.

It should be between (3,3) and (-6,-3).

(3 - 3 , 3 - 2) = (0,1). The y-intercept is (0,1).

So the equation is y = 2/3x + 1.  

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The average reading score on certain tests is given by y = 0.153x + 255.4, where x is the number of years past 1970. In what yea
nirvana33 [79]

Average reading score is given by the expression,

        y = 0.153x + 255.4

Here, x in the number of years past 1970.

To find the year in which the average reading score is 259.378, substitute the value of 'y' in the given expression.

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0.153x = 259.378 - 255.4

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x = \frac{3.978}{0.153}

x = 26

That means given average reading score 259.378 will be 26 years after 1970.

       Therefore, 1996 is the year in which the average reading score will be 259.378.

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brainly.com/question/2883790

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