What is the slope-intercept equation for the line below? (0,1) (4,3)

y2 - y1

x2 - x1

3 - 1        2            1

= =

4 - 0        4            2

Find the y-intercept:

1 = 1/2(0) + b

1 = 0 + b

-0  -0

1 = b

The slope-intercept equation is:

y = 1/2x + 1

so its D

i believe the answer is 323 ft

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places