Which is an equation in point-slope form for the line that passes through the points (−1,4) and (3,−4) ? pls me

a. y+4=2(x−3)

b. y−4=2(x+3)

c. y−3=−2(x+4)

d. y+4=−2(x−3)

What is the value of x? enter your answer in the box. (cm)

Data from 2005 for various age groups show that for each $100 increase in the median weekly income for whites, the median weekly income of blacks increases by $105. also, for workers of ages 25 to 54 the median weekly income for whites was $676 and for blacks was $527. (a) let w represent the median weekly income for whites and b the median weekly income for blacks, and write the equation of the line that gives b as a linear function of w. b = (b) when the median weekly income for whites is $760, what does the equation in (a) predict for the median weekly income for blacks?

What is the value of the discriminant of the quadratic equation -2x = -8x + 8 and what does its value mean about thenumber of real number solutions the equation has?