Answer:
y = .25x + 50
Step-by-step explanation:
Let's use the slope-intercept equation for this problem:
y = mx + b
where m is the slope and b is the y-intercept
In this problem, m is the amount Chris pays per text and b is the flat rate.
m = price per text = .25
b = flat monthly fee = 50
Let's plug these values into the equation:
y = mx + b
y = .25x + 50
where y is the total cost for a month and x is the number of text messages
Therefore, the function is y = .25x + 50
