Answer:
wait so what is the numbers of distance they have swam?
Step-by-step explanation:
Answer:
P(x) = -1.6x + 52
Step-by-step explanation:
Let 2000 as the start point, so it will be the year 0, x = 0, and the population that uses newspaper (y) will be y = 52%. The slope of a linear function is how much it increases or decreases, so the slope is -1.6 (the minus signal indicates that it's decreasing). The slope can also be calculated by the equation:
a = Δy/Δx, where a is the slope, and Δy and Δx are the difference between two points in the function.
So, for x years, the population percentage will be y:
-1.6 = (y - 52)/(x - 0)
-1.6x = y - 52
y = -1.6x + 52
P(x) = y
P(x) = -1.6x + 52
Equation of the line is 3x + y + 4 = 0
Step-by-step explanation:
- Step 1: Given points are (1, -7) and (-4,8)
⇒ x1 = 1, x2 = -4, y1 = -7, y2 = 8
- Step 2: Form equation for the line using (y-y1) = m(x-x1). Find slope m.
⇒ m = (y2 - y1)/(x2-x1) = (8 - -7)/(-4 - 1) = 15/-5 = -3
- Step 3: Substitute the values and form the equation.
⇒ y - -7 = -3(x - 1)
⇒ y + 7 = -3x + 3
⇒ 3x + y + 4 = 0