The table shows the number of minutes jalen talks on his mobile phone and the cost of the phone calls. jalen’s mobile phone cost number of minutes, x 150 220 250 275 cost, y $7.50 $11.00 $12.50 $13.75 if the cost varies directly with the number of minutes jalen talks on the phone, which equation represents the variation?

Step-by-step explanation:

Given :

x                    Cost, y  

150               $7.50  

220              $11.00

250              $12.50  

275              $13.75

To Find: If the cost varies directly with the number of minutes Jalen talks on the phone, which equation represents the variation?

Solution:

To find equation we will use two point slope form.

Substitute the values in the formula.

Hence the equation which represents the variation is  

step-by-step explanation:

y = | -2(-2) |     →     y = | 4 |     →     y = 4       ⇒   (-2, 4)

y = | -2(-1) |     →     y = | 2 |     →       y =   2       ⇒   (-1, 2)    

y = | -2(0) |     →     y = | 0 |     →       y = 0         ⇒   (0, 0)

y = | -2(1) |   c →     y = | -2 |     →     y =   2         ⇒   (1, 2)    

y = | -2(2) |     →     y = | - 4 |     →     y =   4         ⇒   (2, 4)  

step-by-step explanation: