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Veseljchak [2.6K]
3 years ago
11

FIFTY POINTS! PLS HELP QUICK!! the equation of a line that passes through (4,-5) and (0,-3).

Mathematics
2 answers:
lina2011 [118]3 years ago
7 0

Hello there! Your answer would be y = 0.5x - 3.

To find the equation, use slope intercept form, y = mx + b. <em>(m = slope, b = y intercept)</em>

For the slope, solve by subtracting the y values over the x values.

- 5 - - 3 / 0 - 4

- 2 / - 4

The negatives cancel out, and you are left with 0.5 as your slope. Plug that into m.

y = 0.5x + b

Now to find the y intercept. To do this, we can replace the x and y values into the equation and solve for b.

-5 = 0.5(4) + b

-5 = 2 + b

- 3 = b

so, the y intercept has a value of -3. Plug that in to the final equation.

y = 0.5x - 3

Hope this helps and have a great day!

topjm [15]3 years ago
4 0

Answer:

y=-\frac{1}{2}x-3


Step-by-step explanation:

<em>When 2 points are given, we can use the point slope formula for a line to get the equation.</em>

Point-Slope Form of a line:   y-y_{1}=m(x-x_{1})

Where,

  • (x_{1},y_{1}) is point 1 and (x_{2},y_{2}) is point 2
  • m is the slope and given by   m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}

Using the 2 points given and the formulas shown, we can write:

y-(-5)=m(x-4)\\y+5=\frac{-3-(-5)}{0-4}(x-4)\\y+5=-\frac{2}{4}(x-4)\\y+5=-\frac{1}{2}(x-4)\\y+5=-\frac{1}{2}x+2\\y=-\frac{1}{2}x+2-5\\y=-\frac{1}{2}x-3

Hence, y=-\frac{1}{2}x-3 is the equation of the line.

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