Find the exponential function that passes through the points (1, 3) and (2, 9).

y = 3x

Step-by-step explanation: Substitute the two points into the equation y = abx, giving 3 = ab1 and 9 = ab2. Since a = a, then 3 b1 = 9 b2 , rearranged yields 3b2 = 9b1 → 3b2 − 9b = 0 → b(3b − 9) = 0 Thus, b = 0 or b = 3. A curve of exponential function never drop below the x-axis, ignore any values of b that are less than or equal to zero. Therefore, insert b = 3 into 3 b1 = a and 9 b2 = a → a = 1 for both equations. y = abx y = (1)(3x) y = 3x

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.