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Help please!! 10 points

Help please!! 10 points-example-1
User Omar Wagih
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7.6k points

1 Answer

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Answer:

y = 4x - 5

Explanation:

y = xm + b

We need to find the slope (m) and the y-intercept (b).

Use the points given to find the slope.

the slope is the change in y over the change in x. We find the change by subtracting.

(1, -1) (3, 7)

The y's are: 7 and -1

(1,-1) (3,7)

The x's are: 1 and 3


(7 - - 1)/(3-1) =
(7+1)/(2) =
(8)/(2) = 4

The slope (m) is 4.

Now we can use the slope (4) and the either of the points given to find b. I am going to use the point (3,7)

y = 7

x = 3

m = 4

y = mx + b

7 = (4)(3) + b

7 = 12 + b Subtract 12 from both sides

-5 = b

The y intercept of the line (b) is -5.

y = mx + b

y = 4x - 5

User Axel Puig
by
7.0k points