# Simple Algebra: Determining Line Equations

1. The equation of the line L is parallel to y=5x. What is the equation for line L?

2. If (a,-2) is a point on the graph of y=x^2+3x, what is a?

3. Find the equation for the line with the given properties. Express the equation in slope intercept form. The points are P=(-1,-3) and Q=(1,-2). What is the equation of the line?

© BrainMass Inc. brainmass.com June 4, 2020, 3:53 am ad1c9bdddfhttps://brainmass.com/math/basic-algebra/simple-algebra-determining-line-equations-541605

#### Solution Preview

1. L has the equation y = 5x + b, where b is an arbitrary nonzero constant.

2. We have

-2 = a^2 + ...

#### Solution Summary

We solve problems pertaining to lines passing through given points as well the slope and y-intercept.

$2.19