Download (8.1.D): Determine the slope and y-intercept of a linear function

Formative Assessment
Grade Level:
8th
Subject:
Mathematics
Prepared By:
Bill Sebring
State Standard (# and verbiage): (8.1.D): Determine the slope and y-intercept of a linear function described by a symbolic
expression, table, and a graph.
Kid Friendly Objective
I will be able to state the slope and y-intercept of a linear relationship if I am given a table, a
graph, or a symbolic expression.
Formative Assessment
Strategy
Exit Slips
Three representations of linear relationships will be given on the board (table, graph,
symbolic expression). Next to each will be the slope and y-intercept for the given
representation. Each will show a common mistake such as confusing the y-intercept and the
slope, interchanging the difference in y and the difference in x, and not finding the correct
y-intercept from the table.
Upcoming opportunities to use this formative assessment:
Problem 2.2
Materials Needed:
Three representations of
linear relationships and
work showing the
finding of the slope and
the y-intercept.
Additional Notes
Information I can get from this formative assessment:
Can students find the slope from a graph?
Do students know where to find the slope and the y-intercept in y= mx + b?
Can students find the slope by finding the change in y over the change in x?