Question

Write the equation of the line in either point-slope form or slope-intercept form.

Write the equation of a line that has a slope of -3 and passes through the point (1.25, -4).

Use the drop-down menus to select the appropriate values in the equation.

y =
x
+

Answer 1

y = ✔ –3x + ✔ (–0.25)

Explanation:

Answer 2

y = -3x - 0.25

Explanation:

Write the equation of a line that has a slope of -3 and passes through the point (1.25, -4).

We'll use the point-slope form of y = mx + b, where m is the slope and b the y-intercept (the value of y when x = 0).

We are told the slope, m, is -3.

y = -3x + b

We need to find a value for b that will cause the line to go through point (1.25,-4), We can do that by entering this point in the equation we have this far:

y = -3x + b

-4 = -3(1.25) + b

-4 = -3.75 + b

-0.25 = b

The equation is: y = -3x - 0.25

See attached graph.