Question

your cell phone plan costs $15 a month, plus $0.10 per minute.

m = 0.10
b = 15
equation: y = 0.10x + 15

m = 15
b = 0.10
equation: y = 15x + 0.10

m = 15
b = 0.10
equation: y = 0.10x + 15

Explanation:

Step1: Identify slope - intercept form

The cost equation is in the form $y = mx + b$, where $m$ is the rate per minute and $b$ is the fixed monthly cost.

Step2: Determine values of $m$ and $b$

The fixed monthly cost is $15$, so $b = 15$. The cost per minute is $0.10$, so $m=0.10$.

Step3: Write the equation

The equation for the cost $y$ in terms of the number of minutes $x$ is $y = 0.10x + 15$.

Answer:

$m = 0.10$, $b = 15$, Equation: $y = 0.10x + 15$