Which is an equation in point slope form of the line that passes through the points (7 -8) and has a slope of -3

y = -3x +13

Step-by-step explanation:

Slope is also known as gradient. The slope of a line is represented by the equation below.

Slope (m)  = y - y1/ x - x1

Where m = -3 , x1= 7 and y1 = -8

Imputing the values into the equation

m = y - y1/ x - x1

-3 = y - -8 /x - 7

Cross multiply, we have

y + 8 = -3(x - 7)

Expand

y+8 = -3x + 21

Subtract 8 from both sides

y+8-8 = -3x + 21-8

y = -3x +13

I hope this was helpful, please mark as brainliest

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50