Slope-intercept equation from a graph

The  exercise appears under the 8th grade (U.S.) Math Mission and Algebra I Math Mission. This exercise recognizes the equation of a line from it's graph.

Types of Problems
There is one type of problem in this exercise:


 * 1) Find the slope-intercept equation for the graph: This problem provides a graph and a blank template for a slope-intercept form of a line. The student is expected to use the graph to find the slope and y-intercept and place them into the template.Siefag1.png

Strategies
Knowledge of the graphs of lines and familiarity with slope-intercept form of a line are encouraged to ensure success on this exercise.
 * 1) The slope-intercept form of a line is $$y=mx+b$$, where m is the slope and b is the y-intercept.
 * 2) The y-intercept (b) is most clear, and to find the slope look carefully for the places where the line hits grid point. The slope is the "rise over run."

Real-life Applications

 * 1) A line is the basic one-dimensional shape from geometry.
 * 2) A line is used to approximate the most complicated functions in calculus.
 * 3) Lines have many applications in physics, chemistry and economics.