A formula in the form y = mx + b models the value, y, of a new car x years after the initial purchase in 2017. Would you expect m to positive, negative, or zero?

Slope, m, would be

As the amount of time increases {the x-axis},

the value of the car would decrease {y-axis}

Or, in terms of rise over run, as the line runs to the right on the x-axis, it falls on the y-axis.

**negative.**As the amount of time increases {the x-axis},

the value of the car would decrease {y-axis}

Or, in terms of rise over run, as the line runs to the right on the x-axis, it falls on the y-axis.

*Ask the House*