1. 8th Grade Math Presented by Mr. Laws
y = mx + b
Slope Intercept Form
8th Grade Math
Presented by Mr. Laws

2. CCSS Standard
8.F.3 - Interpret the equation y = mx + b as defining a linear function, whose graph is a straight line; give examples of functions that are not linear.
8.F.4 – Find slope: Construct a function to model a linear relationship between two quantities.

3. Essential Question
What is slope intercept form and how do I explain its meaning when graphing a straight line on a coordinate plane?

4. What is Slope Intercept Form?
A slope intercept form is a form that helps draw a linear equation (straight line) on a coordinate plane.
It contains the slope (m) and the y-intercept (b), which is needed when graphing a straight line on a coordinate plane.
y – intercept is the coordinate where the line crosses the y-axis.
y is the output, dependent variable, y-coordinate, or answer,
x is the input, independent variable, x -coordinate, or x-value,

5. How do I write in Slope Intercept Form?
Ex 1:
m = 2; y-int = 1
Ex 3:
m = 1; y-int = - 5
y = 2x + 1
y = x – 5
Ex 2:
m = ; y-int = -3
Ex 4:
m = 0; y-int = 8
y = - 𝟏 𝟒 x – 3
y = 8

6. How do I identify Slope Intercept Form on a Coordinate Plane?

7. How do I identify Slope Intercept Form on a Coordinate Plane?
𝑟𝑖𝑠𝑒=−1 (𝑑𝑜𝑤𝑛 1) 𝑟𝑢𝑛=1 (𝑟𝑖𝑔ℎ𝑡 1)

8. How do I identify Slope Intercept Form on a Coordinate Plane?

9. How do I identify Slope Intercept Form on a Coordinate Plane?
Undefined slopes can not be written in Slope Intercept Form
x = 2
It is written with “ x = “ a number depending on where the vertical line crosses the x-axis (x stands for x-intercept.

10. Summary Can you answer the essential question?
Do you have any questions on what you have learned?
Will you be able to write a summary based on the lesson?