The number of students in a chess club decreased from 28 to 12. What is the percent decrease? Round your answer to the nearest percent.

9514 1404 393

  57%

Step-by-step explanation:

The percentage change is found from ...

  percent change = ((new value) - (old value))/(old value) × 100%

  = (12 -28)/28 × 100%

  = -16/28 × 100% = -57%

The percent decrease is 57%.

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