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3 years ago

PLEASE HELP!!!

Mathematics

1 answer:

ANEK [815]3 years ago

3 0

The answer is D an = -5n + 12

Use the formula an = a1 + d(n - 1) to solve

an = 7 + (-5)(n - 1)

an = 7 + (-5n +5)

an = -5n + 12

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3 years ago

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Lina20 [59]

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Step-by-step explanation:

Hi there!

Slope-intercept form: $y=mx+b$ where m is the slope and b is the y-intercept (the value of y when x=0)

1) Determine the slope (m)

$m=\displaystyle \frac{y_2-y_1}{x_2-x_1}$ where two points that fall on the line are $(x_1,y_1)$ and $(x_2,y_2)$

Given the graph, we determine which points we could use. For example, we could use the two points $(0,2)$ and $(1,-4)$ :

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Therefore, the slope of the line is -6. Plug this into $y=mx+b$ :

$y=-6x+b$

2) Determine the y-intercept (b)

Recall that the y-intercept occurs when x=0. Given the point (0,2), we know that the y-intercept is 2. Plug this into $y=-6x+b$ :

$y=-6x+2$

I hope this helps!

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