In January, the depth of a lake was 812 feet. In August, the depth of the lake was 446.6 feet. What is the percentage decrease of the depth of the lake from January to August?

45%

Step-by-step explanation:

To find the percentage decrease, we need to find the decrease first.

Decrease = 812 - 446.6

                = 365.4

Percentage decrease = × 100%

                                    = 45%

step-by-step explanation:

let

we know that

the y-intercept is the y-coordinate of the point when the value of x is equal to zero

so

the y-coordinate of the point a is the y-intercept

the answer part a) is

the value of y-intercept is

part b) find the slope m

we know that

the value of the slope is equal to

substitute the values

therefore

the answer part b) is

the value of the slope is equal to

the general answer is

the slope is

the value of y-intercept is

0.6

39mph

step-by-step explanation: