Proportional Relationships
A proportional relationship creates a straight line that goes through the origin when graphed.
Equation y=kx
k is the constant of proportionality which also represents the slope of the line!
Click here to practice finding the slope from a proportional relationship
Slope is rise over run and we use the letter m to represent slope! Slope describes the direction AND steepness of a line.
To find slope count the change in y and the change in x and write it as change in y/change in x
Click here to practice finding slope
To find slope when given two points use the slope formula:
m = y2 - y1
x2 - x1
Click here to practice
A proportional relationship creates a straight line that goes through the origin when graphed.
Equation y=kx
k is the constant of proportionality which also represents the slope of the line!
Click here to practice finding the slope from a proportional relationship
Slope is rise over run and we use the letter m to represent slope! Slope describes the direction AND steepness of a line.
To find slope count the change in y and the change in x and write it as change in y/change in x
Click here to practice finding slope
To find slope when given two points use the slope formula:
m = y2 - y1
x2 - x1
Click here to practice
Slope - Intercept Form
When a graph is a NON-proportional relationship we can use slope - intercept form to write an equation for it.
Click here to watch a BrainPOP video!
y = mx + b
m = slope
b = y-intercept (where the line touches the y - axis!)
Click here to practice writing equations from a graph in slope - intercept form
When a graph is a NON-proportional relationship we can use slope - intercept form to write an equation for it.
Click here to watch a BrainPOP video!
y = mx + b
m = slope
b = y-intercept (where the line touches the y - axis!)
Click here to practice writing equations from a graph in slope - intercept form