You are buying 12-packs of Mountain Dew for $\text{4.50}4.50 each and have a gift card worth $77. The function m\left(x\right)=4
.50x-7m(x)=4.50x−7 represents the total cost m\left(x\right)m(x) if you buy xx 12-packs of Mountain Dew and use the gift card. How much would you pay to buy 44 12-packs of Mountain Dew?
The linear equation can be written in the form y = mx + b. "y" and "x" stay as they are. The "m" is the slope or rate of change. The b is the y-intercept.