What two pieces of information are needed to write a linear equation?

The slope (m) and the y-intercept (b).

In the bowling example, what does the slope represent?

The slope represents the cost per game.

The y-intercept represents the initial cost of renting shoes.

I can determine the equation of a line that represents a real life problem from its graph.

1
To write a linear equation, you need to know the slope (m) and the y-intercept (b); slope-intercept form is written as y = mx + b.
2
The slope (m) represents the cost per game, while the y-intercept (b) represents the initial cost, such as the cost for shoe rentals.
3
To calculate the cost for a specific number of games, substitute the number of games for x in the equation; to determine how many games can be played with a certain amount, substitute the total amount for y and solve for x.