Ineed to find y=mx+b. i found m but i forgot how to find b.

Y = mx + b. This linear graph passes through A(0,50) and B(10,51)

m = (y₂-y₁)/(x₂-x₁)
m= (51-50)/10-0)
m=(1)(10)

y = (1/x) + b. To find b, you plugin the coordinates of either A or B,
say A(0,50):

50 = (1/10).(0) + b
50 = 0+b  and b= 51

Hence the equation is y =0.1x + 50

f(1) = 3

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Algebra I

FunctionsFunction Notation

Step-by-step explanation:

Step 1: Define

f(x) = 4x - 1

f(1) is x = 1

Step 2: Evaluate

Substitute in x [Function]:                                                                              f(1) = 4(1) - 1Multiply:                                                                                                           f(1) = 4 - 1Subtract:                                                                                                          f(1) = 3