Interpreting the Slope and the y-intercept of a Line of Best Fit!
In y = mx + b,
and b is the y-intercept!
m is the SLOPE
What is the meaning of the slope in the situation to the left?
slope = rise/run = y/x = cost/miles
Because our slope is 3, that means that it costs $3 per mile traveled!
What is the meaning of the y-intercept in the situation to the left?
The y-intercept is the value of y when x = 0
Because our y-intercept is 10, that means that it costs $10 when someone has traveled 0 miles (which is the flat fee).