ex. Write an equation for a line described using y=mx+b with a slope of 2 and passing through the point (-3,-1)?

Ex. Thelma's average driving speed is 7 miles per hour faster than Doug's. In the same length of time it takes Thelma to drive 174 miles doug only drives 153 miles. What is Thelma's average driving speed?

ex. Find the equation of all lines perpendicular to x + 2y = 8

A line is perpendicular to another line if and only if their slopes are perpendicular.

This means the first step we should do is to get the slope of the first line.

Putting x +2y = 8 in Slope-Intercept for (y = mx+b)

2y = -x + 8 subtract x from both sides

y = -(1/2)x + 4