Topic 5 DQ 1-math
42667Select one of the options below and create a linear equation to represent the monthly bill. When will the plans cost the same? Explain when each plan is a better option.
Option 1: Plan A $39.99 for 200 min and $1.25 for each min after. Plan B $29.99 for 200 min and $1.50 for each min after.
Option 2: Plan A $25.75 plus $.75 per min. Plan B $20.99 plus $1.00 per min
Option 3: Plan A $39.99 plus $1.25 per min. Plan B $25.99 plus $1.75 per min
Option 4: Plan A $45.99 for 400 min and $.50 for each min after. Plan B $49.99 for 400 min and $.40 for each min after
HELP WITH LINEAR EQUATIONS BELOW
Creating a linear equation for each plan is usually the part that is left out of discussion question responses. The form I am looking for is y = mx + b it is called slope intercept form. m will be your rate per min and b will be your initial cost. You will leave y and x in the equation.
You will need a linear equation for each plan for the second part of the question where you find when the plans will cost the same. Finding when they will be the same can be found by solving the system of equations.
You can use Excel. This video does a pretty good job. You may find the graphing option under the insert tab instead of the way shown.
Solving a system of equation using graphing, substitution, and elimination without Excel
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