HALP NEEDED ILL GIVE BRAINLEIST

The slope of the line that contains the points (1, -1) and (2, 3) is 4. What is the y-intercept?

A. 5

B. 4

C. -4

D. -5

Which best explains why this triangle is or is not a right triangle?

Evaluate 8j -k+148j−k+14 when j=0.25j=0.25 and k=1k=1.

For [tex]f(x) = 4x + 1[/tex] and (x) = [tex]g(x)= x^{2} -5,[/tex] find [tex](\frac{g}{f}) (x)[/tex]a. [tex]\frac{x^{2} - 5 }{4x +1 },x[/tex] ≠ [tex]-\frac{1}{4}[/tex]b. x[tex]\frac{4 x +1 }{x^{2} - 5}, x[/tex] ≠ ± [tex]\sqrt[]{5}[/tex]c. [tex]\frac{4x +1}{x^{2} -5}[/tex]d.[tex]\frac{x^{2} -5 }{4x + 1}[/tex]