Answer:
Q2: J. all real numbers.
Q4: [tex]f(3)=-20[/tex]
Q15: [tex]y=-3x+5[/tex]
Step-by-step explanation:
Q2: J. All real numbers.
Range: It can be [tex]y\geq 1[/tex].
It can't be [tex]y\geq 2[/tex].
Domain: It can't be [tex]x\geq 1[/tex] because it is going from (-∞,+∞)
Q4:
[tex]f(x)=-2x^2+x-5,f(3)=?[/tex]
Plugin x with 3 into the equation.
[tex]f(3)=-2(3)^2+(3)-5\\f(3)=-2*9+3-5\\f(3)=-18+3-5=-20\\f(3)=-20[/tex]
Q15: point-slope form.
[tex]y-(y_1)=m(x-x_0)[/tex], plugin [tex](2,-1)=(x_0,y_0)[/tex] and m=-3
[tex]y-(-1)=-3(x-(2))\\y+1=-3(x-2)\\y+1=-3x+6\\y=-3x+5[/tex]
