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lesantik [10]
3 years ago
11

Find the equation of the line that passes through points A and B. y X A (4, 7) B (2, 3)

Mathematics
2 answers:
alexgriva [62]3 years ago
6 0

Answer:

y - 3 = 2(x - 2)

Step-by-step explanation:

As we move from Point B (2, 3) to Point A (4, 7), we see x increasing by 2 from 2 to 4 and y increasing by 4 from 3 to 7.  Hence the rise is 4 and the run is 2, which means that the slope of this line is m = rise / run = 4/2 = 2.

Using the point-slope formula y - k = m(x - h) and the point (2, 3), we get:

y - 3 = 2(x - 2)

g100num [7]3 years ago
3 0

Answer:

y = 2x - 1.

Step-by-step explanation:

The slope = (7-3)/(4-2)

= 4/2

= 2.

y - y1 = m(x - x1)

Here m = 2 , x1 = 2 and y1 = 3. So we have:

y - 3 = 2(x - 2)

y = 2x - 4 + 3

y = 2x - 1.

We have used the point (2, 3) to find the equation but we could have used (4, 7). We would have got the same answer.

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3 years ago
1. The scale on a map reads 3 inches = 25 miles.
KonstantinChe [14]

Answer:

D. 62.5

Step-by-step explanation:

2 ways

1.

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2 years ago
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without graphing, determine whether the function represents exponential growth or exponential decay. then find the y-intercept.
Westkost [7]

Hello from MrBillDoesMath!

Answer:

exponential growth , y-intercept 3



Discussion:

Any equation of the form   b^x          (b a constant) models <u>exponential </u>growth.

The y-intercept value is the value of y when x = 0, that is,

y = 3 (0.59)^0 = 3 * 1 = 3

Thank you,

MrB

8 0
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Read 2 more answers
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