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Find the equation of lines in the following cases:

(a) Through [tex]\((0,0)\)[/tex] and with a slope of [tex]\(-\frac{3}{4}\)[/tex]


Sagot :

Certainly! Let's find the equation of the line that passes through the point [tex]\((0,0)\)[/tex] with a slope of [tex]\(-\frac{3}{4}\)[/tex].

### Step-by-Step Solution:

1. Identify the Point and the Slope:
- Point: [tex]\((x_1, y_1) = (0, 0)\)[/tex]
- Slope: [tex]\(m = -\frac{3}{4}\)[/tex]

2. Use the Point-Slope Formula:
The point-slope form of a line's equation is given by:
[tex]\[ y - y_1 = m(x - x_1) \][/tex]
Plugging in the given point and slope:
[tex]\[ y - 0 = -\frac{3}{4}(x - 0) \][/tex]

3. Simplify the Equation:
Since [tex]\(y_1 = 0\)[/tex] and [tex]\(x_1 = 0\)[/tex], the equation simplifies to:
[tex]\[ y = -\frac{3}{4}x \][/tex]

4. Write the Equation in Slope-Intercept Form:
The slope-intercept form of a line's equation is [tex]\(y = mx + b\)[/tex], where [tex]\(m\)[/tex] is the slope and [tex]\(b\)[/tex] is the y-intercept. From the simplified equation above:
[tex]\[ y = -\frac{3}{4}x + 0 \][/tex]

5. Final Equation:
The equation of the line in slope-intercept form is:
[tex]\[ y = -0.75x + 0.0 \][/tex]

Hence, the equation of the line passing through the point [tex]\((0, 0)\)[/tex] with a slope of [tex]\(-\frac{3}{4}\)[/tex] is:
[tex]\[ y = -0.75x + 0.0 \][/tex]
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