Graph with Slopes

1
Graph with Slopes y-Intercepts

• Learn to use slopes and y-intercepts
• to graph linear equations.

2
In an equation written in slope-intercept form, y
mx b, m is the slope and b is the y-intercept.
3
y mx b
You can tell by looking at the equation not only
where the line crosses y, but whether it has a
positive or negative slope. If m is positive the
slope is positive, and your line will go up from
left to right. If m is negative, the slope is
negative and your line will go down from left to
right.
4
Determine what is the slope, y-intercept, and
direction of each equation.

1. Slope 3 y-intercept 4goes up left to right
2. Slope ½ y-intercept -9 goes up left to
   right
3. Slope -4/5 y-intercept 7 goes down left to
   right
4. Slope -2 y-intercept -4 goes down left to
   right

1. y 3x 4
2. y ½ x 9
3. y -4/5 x 7
4. y -2x - 4

5
Graph the line y 2/5x 2The slope is 2/5
the y-intercept is 2.

• Steps to graphing a line in slope intercept form
• Plot the y-intercept. (0,2)
• Count up 2 over 5 and plot next point.
• Connect the dots.

6
Graph the line y -x 3

1. Plot the y-intercept (0, 3)
2. Slope -1
3. Line will go down from left to right.

7
Graph the line y 2/3x 4

1. Plot the y-intercept (0, 4)
2. Slope 2/3
3. Line will go up from left to right.