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Find the equation (in terms of [tex]\( x \)[/tex]) of the line through the points [tex]\((-4, 2)\)[/tex] and [tex]\((0, -3)\)[/tex].

[tex]\[ y = \boxed{\phantom{y=}} \][/tex]


Sagot :

Certainly! To find the equation of the line passing through the points [tex]\((-4, 2)\)[/tex] and [tex]\((0, -3)\)[/tex], we can follow these steps:

1. Calculate the slope (m) of the line:

The slope of a line passing through two points [tex]\((x_1, y_1)\)[/tex] and [tex]\((x_2, y_2)\)[/tex] is given by:

[tex]\[ m = \frac{y_2 - y_1}{x_2 - x_1} \][/tex]

Using the points [tex]\((-4, 2)\)[/tex] and [tex]\((0, -3)\)[/tex], we have:

[tex]\[ m = \frac{-3 - 2}{0 - (-4)} = \frac{-5}{4} = -1.25 \][/tex]

2. Find the y-intercept (b):

The equation of a line in slope-intercept form is:

[tex]\[ y = mx + b \][/tex]

We already have the slope [tex]\(m = -1.25\)[/tex]. We can use one of the points to find the y-intercept [tex]\(b\)[/tex]. Let's use the point [tex]\((0, -3)\)[/tex]:

[tex]\[ -3 = -1.25(0) + b \Rightarrow b = -3 \][/tex]

3. Write the equation of the line:

Now that we have the slope [tex]\(m = -1.25\)[/tex] and the y-intercept [tex]\(b = -3\)[/tex], we can write the equation of the line as:

[tex]\[ y = -1.25x - 3 \][/tex]

Therefore, the equation of the line passing through the points [tex]\((-4, 2)\)[/tex] and [tex]\((0, -3)\)[/tex] is:

[tex]\[ \boxed{y = -1.25x - 3} \][/tex]