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If x = time, and y = the number of problems in the set, which equation models the relationship?
Question 3 options:

y = 12x

y = x + 12

y = 1.2x

y = x + 1.2

C, y = 1.2x

Step-by-step explanation:

Notice that x, representing time, is multiplied by 1.2 each time to get y, representing the number of problems. You can find this out by dividing y by x. 36/30 = 1.2.

48/40 = 1.2.

And so on...

P.S.: If you ever come across a problem like this, subtract one y value by another y value, then subtract the corresponding x values from eachother, then make both numbers into one fraction with y as the numerator and x as the denominator. In this problem, that would look like this:  

48 and 36 are both y values: 48 - 36 = 12

40 and 30 are the corresponding x values: 40 - 30 = 10

We get 12/10, which can be simplified to 1.2. The slope is 1.2.

This method will always work for a straight line and will be taught to you soon if you haven't learned it already.

step-by-step explanation:

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step-by-step explanation: