Write the equation for an exponential function, in the form y=a x b^x, whose graph though the coordinate points (1,7.5) and (3,16.875).

y = 5*(1.5)ˣ

Step-by-step explanation:

The exponential function is given in the form y = a*bˣ.

Given coordinate points are (1, 7.5) and (3, 16.875).

It means 7.5 = a*b¹ and 16.875 = a*b³

Dividing the second equation by the first equation:-

16.875 / 7.5 = a*b³ / a*b¹

b² = 2.25

b = 1.5

Now substitute the value of b into first equation:-

7.5 = a*1.5

a = 7.5/1.5

a = 5

Hence, y = 5*(1.5)ˣ

the equation for this situation is y=122+45. to solve the equation you would add 45 and 122 to get a total of 167lbs. in conclusion, grace's weight eight weeks ago was 167lbs.  

1. 22

2. 1

3. 7

4. 18

step-by-step explanation

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