The phone company Ringular has a monthly cellular plan where a customer pays a flat monthly fee and then a certain amount of money per minute used on the phone If a customer uses 370 minutes, the monthly cost will be 176. If the customer uses 690 minutes, the monthly cost will be 304. A) Find an equation in the form y=mx+b where z is the number of monthly minutes used and y is the total monthly of the Ringular plan. Answer: 1 = y=0.4x+28 B) Use your equation to find the total monthly cost if 692 minutes are used. Answer: If 692 minutes are used, the total cost will be square dollars. Question Help: Video

To find the equation in the form $y=mx+b$, we need to determine the slope (m) and the y-intercept (b).<br /><br />Given:<br />- When 370 minutes are used, the monthly cost is $176.<br />- When 690 minutes are used, the monthly cost is $304.<br /><br />We can use these two points to find the slope (m):<br />$m = \frac{y_2 - y_1}{x_2 - x_1} = \frac{304 - 176}{690 - 370} = \frac{128}{320} = 0.4$<br /><br />Now, we can use one of the points to find the y-intercept (b). Let's use the point (370, 176):<br />$176 = 0.4(370) + b$<br />$176 = 148 + b$<br />$b = 176 - 148$<br />$b = 28$<br /><br />So, the equation in the form $y=mx+b$ is:<br />$y = 0.4x + 28$<br /><br />B) To find the total monthly cost if 692 minutes are used, we can substitute x = 692 into the equation:<br />$y = 0.4(692) + 28$<br />$y = 276.8 + 28$<br />$y = 304.8$<br /><br />Therefore, if 692 minutes are used, the total cost will be $304.8 dollars.