Linear Functions Help
Could I get some help with this math problem? I'm a complete idiot when it comes to math.
The cost of water use (in dollars) is a linear function of the amount of water used (in hundreds of cubic feet, HCF), as shown in the figure below. The cost for using 14 HCF of water is $39.40, and the cost for using 28 HCF is $63.90. What is the cost for using 19 HCF of water?
No clue on how to solve this.
I don't think your post is in the right forum...
Originally Posted by eraser851
Given that data we can make two ordered pairs (14,39.40) and (19,63.90)
using these two point we can find the slope m.
We can then use the slope we just calculated and one of our ordered pairs to find the equation of the line.
we can use this equation to find the value for y when x=19.